# WPH14 Electric and Magnetic Fields Topic Questions

> Edexcel IAL WPH14: every Electric and Magnetic Fields topic question from 20 papers (2020–2026), grouped by syllabus point. 304 questions, 770 marks, with…

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Edexcel IAL · Physics · WPH14 · A Level

Every WPH14 Electric and Magnetic Fields topic question from the 2018–current syllabus, drawn from 20 papers (2020–2026) and grouped by syllabus point. Each row opens a page listing the exact question numbers, marks and a direct link into the paper. These are questions by topic, not full papers, so you can revise one topic at a time.

- WPH14
- 19 subtopics
- 304 topic questions
- 20 papers
- 770 tagged marks
- [Back to Electric and Magnetic Fields](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/)
- [All paper codes](https://www.examsci.com/topics/)

Core finding

**110 understand how to use Faraday's law to determine the magnitude of… is the most frequently assessed subtopic in Electric and Magnetic Fields, with 52 topic questions and 170 marks across 20 papers.** 102 be able to draw and interpret charge and discharge… follows with 35 topic questions and 105 marks. The topic contains 19 subtopics, 304 topic questions and 770 marks in total. Rows count only the parts tagged to that subtopic, keep the same colour in both charts and repeat paper count, tagged marks and year range in the native table.

## Topic question count and mark distribution

Subtopics are on the vertical axis and sorted from highest to lowest. Only the parts whose knowledge graph matches a subtopic are counted for it, and percentages are each row's share of the tagged total in that chart. A part tagged to several subtopics is counted in each bar, so the bars are not a partition of the topic total.

### Questions by subtopic

question items

- [110 understand how to use Faraday's law to determine the magnitude of an induced e.m.f. and be able to use the equation that combines Faraday's and Lenz's laws $E=\frac{-d(N\phi)}{dt}$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/110-understand-how-to-use-faraday-s-law-to-determine-the-magnitude-of-an-induced-e-m/) (20 papers) — 52 · 13.6%
- [102 be able to draw and interpret charge and discharge curves for resistor capacitor circuits and understand the significance of the time constant $RC$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/102-be-able-to-draw-and-interpret-charge-and-discharge-curves-for-resistor-capacitor/) (19 papers) — 35 · 9.2%
- [93 understand that electric field strength is defined as $E=\frac{F}{Q}$ and be able to use this equation](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/93-understand-that-electric-field-strength-is-defined-as-e-frac-f-q-and-be-able-to/) (17 papers) — 30 · 7.9%
- [107 be able to use the equation $F=BIl\sin\theta$ and apply Fleming's left-hand rule to current carrying conductors in a magnetic field](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/107-be-able-to-use-the-equation-f-bil-sin-theta-and-apply-fleming-s-left-hand-rule-to/) (19 papers) — 27 · 7.1%
- [104 be able to use the equation $Q=Q_{0}e^{-t/RC}$ and derive and use related equations for exponential discharge in a resistor-capacitor circuit, $I=I_{0}e^{-t/RC}$ and $V=V_{0}e^{-t/RC}$ and the corresponding log equations $\ln Q=\ln Q_{0}-\frac{t}{RC}$, $\ln I=\ln I_{0}-\frac{t}{RC}$ and $\ln V=\ln V_{0}-\frac{t}{RC}$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/104-be-able-to-use-the-equation-q-q-0-e-t-rc-and-derive-and-use-related-equations-for/) (18 papers) — 26 · 6.8%
- [99 be able to draw and interpret diagrams using field lines and equipotentials to describe radial and uniform electric fields](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/99-be-able-to-draw-and-interpret-diagrams-using-field-lines-and-equipotentials-to/) (18 papers) — 25 · 6.6%
- [97 be able to use the equation $E=\frac{V}{d}$ for an electric field between parallel plates](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/97-be-able-to-use-the-equation-e-frac-v-d-for-an-electric-field-between-parallel/) (17 papers) — 24 · 6.3%
- [100 understand that capacitance is defined as $C=\frac{Q}{V}$ and be able to use this equation](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/100-understand-that-capacitance-is-defined-as-c-frac-q-v-and-be-able-to-use-this/) (17 papers) — 22 · 5.8%
- [98 be able to use $V=\frac{Q}{4\pi\epsilon_{0}r}$ for a radial field](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/98-be-able-to-use-v-frac-q-4-pi-epsilon-0-r-for-a-radial-field/) (18 papers) — 20 · 5.2%
- [101 be able to use the equation $W=\frac{1}{2}QV$ for the energy stored by a capacitor, be able to derive the equation from the area under a graph of potential difference against charge stored and be able to derive and use the equations $W=\frac{1}{2}CV^{2}$ and $W=\frac{1}{2}\frac{Q^{2}}{C}$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/101-be-able-to-use-the-equation-w-frac-1-2-qv-for-the-energy-stored-by-a-capacitor-be/) (18 papers) — 19 · 5.0%
- [94 be able to use the equation $F=\frac{Q_{1}Q_{2}}{4\pi\epsilon_{0}r^{2}}$ for the force between two charges](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/94-be-able-to-use-the-equation-f-frac-q-1-q-2-4-pi-epsilon-0-r-2-for-the-force/) (15 papers) — 18 · 4.7%
- [106 be able to use the equation $F=Bqv\sin\theta$ and apply Fleming's left-hand rule to charged particles moving in a magnetic field](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/106-be-able-to-use-the-equation-f-bqv-sin-theta-and-apply-fleming-s-left-hand-rule-to/) (12 papers) — 15 · 3.9%
- [105 understand and use the terms magnetic flux density $B$, flux $\phi$ and flux linkage $N\phi$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/105-understand-and-use-the-terms-magnetic-flux-density-b-flux-phi-and-flux-linkage-n/) (12 papers) — 14 · 3.7%
- [95 be able to use the equation $E=\frac{Q}{4\pi\epsilon_{0}r^{2}}$ for the electric field due to a point charge](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/95-be-able-to-use-the-equation-e-frac-q-4-pi-epsilon-0-r-2-for-the-electric-field-due/) (11 papers) — 12 · 3.1%
- [108 understand the factors affecting the e.m.f. induced in a coil when there is relative motion between the coil and a permanent magnet](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/108-understand-the-factors-affecting-the-e-m-f-induced-in-a-coil-when-there-is/) (9 papers) — 11 · 2.9%
- [92 understand that an electric field (force field) is defined as a region where a charged particle experiences a force](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/92-understand-that-an-electric-field-force-field-is-defined-as-a-region-where-a/) (6 papers) — 11 · 2.9%
- [109 understand the factors affecting the e.m.f. induced in a coil when there is a change of current in another coil linked with this coil](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/109-understand-the-factors-affecting-the-e-m-f-induced-in-a-coil-when-there-is-a/) (8 papers) — 10 · 2.6%
- [96 know and understand the relation between electric field and electric potential](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/96-know-and-understand-the-relation-between-electric-field-and-electric-potential/) (6 papers) — 7 · 1.8%
- [103 CORE PRACTICAL 11: Use an oscilloscope or data logger to display and analyse the potential difference (p.d.) across a capacitor as it charges and discharges through a resistor](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/103-core-practical-11-use-an-oscilloscope-or-data-logger-to-display-and-analyse-the/) (3 papers) — 3 · 0.8%

### Marks by subtopic

marks

- [110 understand how to use Faraday's law to determine the magnitude of an induced e.m.f. and be able to use the equation that combines Faraday's and Lenz's laws $E=\frac{-d(N\phi)}{dt}$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/110-understand-how-to-use-faraday-s-law-to-determine-the-magnitude-of-an-induced-e-m/) (20 papers) — 170 · 16.4%
- [102 be able to draw and interpret charge and discharge curves for resistor capacitor circuits and understand the significance of the time constant $RC$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/102-be-able-to-draw-and-interpret-charge-and-discharge-curves-for-resistor-capacitor/) (19 papers) — 105 · 10.2%
- [93 understand that electric field strength is defined as $E=\frac{F}{Q}$ and be able to use this equation](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/93-understand-that-electric-field-strength-is-defined-as-e-frac-f-q-and-be-able-to/) (17 papers) — 93 · 9.0%
- [104 be able to use the equation $Q=Q_{0}e^{-t/RC}$ and derive and use related equations for exponential discharge in a resistor-capacitor circuit, $I=I_{0}e^{-t/RC}$ and $V=V_{0}e^{-t/RC}$ and the corresponding log equations $\ln Q=\ln Q_{0}-\frac{t}{RC}$, $\ln I=\ln I_{0}-\frac{t}{RC}$ and $\ln V=\ln V_{0}-\frac{t}{RC}$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/104-be-able-to-use-the-equation-q-q-0-e-t-rc-and-derive-and-use-related-equations-for/) (18 papers) — 75 · 7.3%
- [97 be able to use the equation $E=\frac{V}{d}$ for an electric field between parallel plates](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/97-be-able-to-use-the-equation-e-frac-v-d-for-an-electric-field-between-parallel/) (17 papers) — 75 · 7.3%
- [107 be able to use the equation $F=BIl\sin\theta$ and apply Fleming's left-hand rule to current carrying conductors in a magnetic field](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/107-be-able-to-use-the-equation-f-bil-sin-theta-and-apply-fleming-s-left-hand-rule-to/) (19 papers) — 68 · 6.6%
- [98 be able to use $V=\frac{Q}{4\pi\epsilon_{0}r}$ for a radial field](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/98-be-able-to-use-v-frac-q-4-pi-epsilon-0-r-for-a-radial-field/) (18 papers) — 55 · 5.3%
- [99 be able to draw and interpret diagrams using field lines and equipotentials to describe radial and uniform electric fields](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/99-be-able-to-draw-and-interpret-diagrams-using-field-lines-and-equipotentials-to/) (18 papers) — 51 · 4.9%
- [100 understand that capacitance is defined as $C=\frac{Q}{V}$ and be able to use this equation](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/100-understand-that-capacitance-is-defined-as-c-frac-q-v-and-be-able-to-use-this/) (17 papers) — 50 · 4.8%
- [94 be able to use the equation $F=\frac{Q_{1}Q_{2}}{4\pi\epsilon_{0}r^{2}}$ for the force between two charges](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/94-be-able-to-use-the-equation-f-frac-q-1-q-2-4-pi-epsilon-0-r-2-for-the-force/) (15 papers) — 46 · 4.4%
- [101 be able to use the equation $W=\frac{1}{2}QV$ for the energy stored by a capacitor, be able to derive the equation from the area under a graph of potential difference against charge stored and be able to derive and use the equations $W=\frac{1}{2}CV^{2}$ and $W=\frac{1}{2}\frac{Q^{2}}{C}$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/101-be-able-to-use-the-equation-w-frac-1-2-qv-for-the-energy-stored-by-a-capacitor-be/) (18 papers) — 43 · 4.2%
- [108 understand the factors affecting the e.m.f. induced in a coil when there is relative motion between the coil and a permanent magnet](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/108-understand-the-factors-affecting-the-e-m-f-induced-in-a-coil-when-there-is/) (9 papers) — 40 · 3.9%
- [105 understand and use the terms magnetic flux density $B$, flux $\phi$ and flux linkage $N\phi$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/105-understand-and-use-the-terms-magnetic-flux-density-b-flux-phi-and-flux-linkage-n/) (12 papers) — 37 · 3.6%
- [106 be able to use the equation $F=Bqv\sin\theta$ and apply Fleming's left-hand rule to charged particles moving in a magnetic field](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/106-be-able-to-use-the-equation-f-bqv-sin-theta-and-apply-fleming-s-left-hand-rule-to/) (12 papers) — 30 · 2.9%
- [109 understand the factors affecting the e.m.f. induced in a coil when there is a change of current in another coil linked with this coil](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/109-understand-the-factors-affecting-the-e-m-f-induced-in-a-coil-when-there-is-a/) (8 papers) — 29 · 2.8%
- [92 understand that an electric field (force field) is defined as a region where a charged particle experiences a force](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/92-understand-that-an-electric-field-force-field-is-defined-as-a-region-where-a/) (6 papers) — 27 · 2.6%
- [95 be able to use the equation $E=\frac{Q}{4\pi\epsilon_{0}r^{2}}$ for the electric field due to a point charge](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/95-be-able-to-use-the-equation-e-frac-q-4-pi-epsilon-0-r-2-for-the-electric-field-due/) (11 papers) — 23 · 2.2%
- [96 know and understand the relation between electric field and electric potential](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/96-know-and-understand-the-relation-between-electric-field-and-electric-potential/) (6 papers) — 12 · 1.2%
- [103 CORE PRACTICAL 11: Use an oscilloscope or data logger to display and analyse the potential difference (p.d.) across a capacitor as it charges and discharges through a resistor](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/103-core-practical-11-use-an-oscilloscope-or-data-logger-to-display-and-analyse-the/) (3 papers) — 5 · 0.5%

## Subtopic comparison matrix

Curriculum order is by syllabus number, then alphabetically. Every row links to the matching past-paper question list.

| Subtopic | Topic questions | Papers | Marks | Years | |
| --- | --- | --- | --- | --- | --- |
| **[92 understand that an electric field (force field) is defined as a region where a charged particle experiences a force](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/92-understand-that-an-electric-field-force-field-is-defined-as-a-region-where-a/)** | 11 | 6 | 27 | 2020–2025 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/92-understand-that-an-electric-field-force-field-is-defined-as-a-region-where-a/) |
| **[93 understand that electric field strength is defined as $E=\frac{F}{Q}$ and be able to use this equation](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/93-understand-that-electric-field-strength-is-defined-as-e-frac-f-q-and-be-able-to/)** | 30 | 17 | 93 | 2020–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/93-understand-that-electric-field-strength-is-defined-as-e-frac-f-q-and-be-able-to/) |
| **[94 be able to use the equation $F=\frac{Q_{1}Q_{2}}{4\pi\epsilon_{0}r^{2}}$ for the force between two charges](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/94-be-able-to-use-the-equation-f-frac-q-1-q-2-4-pi-epsilon-0-r-2-for-the-force/)** | 18 | 15 | 46 | 2020–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/94-be-able-to-use-the-equation-f-frac-q-1-q-2-4-pi-epsilon-0-r-2-for-the-force/) |
| **[95 be able to use the equation $E=\frac{Q}{4\pi\epsilon_{0}r^{2}}$ for the electric field due to a point charge](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/95-be-able-to-use-the-equation-e-frac-q-4-pi-epsilon-0-r-2-for-the-electric-field-due/)** | 12 | 11 | 23 | 2020–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/95-be-able-to-use-the-equation-e-frac-q-4-pi-epsilon-0-r-2-for-the-electric-field-due/) |
| **[96 know and understand the relation between electric field and electric potential](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/96-know-and-understand-the-relation-between-electric-field-and-electric-potential/)** | 7 | 6 | 12 | 2021–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/96-know-and-understand-the-relation-between-electric-field-and-electric-potential/) |
| **[97 be able to use the equation $E=\frac{V}{d}$ for an electric field between parallel plates](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/97-be-able-to-use-the-equation-e-frac-v-d-for-an-electric-field-between-parallel/)** | 24 | 17 | 75 | 2020–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/97-be-able-to-use-the-equation-e-frac-v-d-for-an-electric-field-between-parallel/) |
| **[98 be able to use $V=\frac{Q}{4\pi\epsilon_{0}r}$ for a radial field](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/98-be-able-to-use-v-frac-q-4-pi-epsilon-0-r-for-a-radial-field/)** | 20 | 18 | 55 | 2020–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/98-be-able-to-use-v-frac-q-4-pi-epsilon-0-r-for-a-radial-field/) |
| **[99 be able to draw and interpret diagrams using field lines and equipotentials to describe radial and uniform electric fields](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/99-be-able-to-draw-and-interpret-diagrams-using-field-lines-and-equipotentials-to/)** | 25 | 18 | 51 | 2020–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/99-be-able-to-draw-and-interpret-diagrams-using-field-lines-and-equipotentials-to/) |
| **[100 understand that capacitance is defined as $C=\frac{Q}{V}$ and be able to use this equation](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/100-understand-that-capacitance-is-defined-as-c-frac-q-v-and-be-able-to-use-this/)** | 22 | 17 | 50 | 2020–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/100-understand-that-capacitance-is-defined-as-c-frac-q-v-and-be-able-to-use-this/) |
| **[101 be able to use the equation $W=\frac{1}{2}QV$ for the energy stored by a capacitor, be able to derive the equation from the area under a graph of potential difference against charge stored and be able to derive and use the equations $W=\frac{1}{2}CV^{2}$ and $W=\frac{1}{2}\frac{Q^{2}}{C}$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/101-be-able-to-use-the-equation-w-frac-1-2-qv-for-the-energy-stored-by-a-capacitor-be/)** | 19 | 18 | 43 | 2020–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/101-be-able-to-use-the-equation-w-frac-1-2-qv-for-the-energy-stored-by-a-capacitor-be/) |
| **[102 be able to draw and interpret charge and discharge curves for resistor capacitor circuits and understand the significance of the time constant $RC$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/102-be-able-to-draw-and-interpret-charge-and-discharge-curves-for-resistor-capacitor/)** | 35 | 19 | 105 | 2020–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/102-be-able-to-draw-and-interpret-charge-and-discharge-curves-for-resistor-capacitor/) |
| **[103 CORE PRACTICAL 11: Use an oscilloscope or data logger to display and analyse the potential difference (p.d.) across a capacitor as it charges and discharges through a resistor](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/103-core-practical-11-use-an-oscilloscope-or-data-logger-to-display-and-analyse-the/)** | 3 | 3 | 5 | 2021–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/103-core-practical-11-use-an-oscilloscope-or-data-logger-to-display-and-analyse-the/) |
| **[104 be able to use the equation $Q=Q_{0}e^{-t/RC}$ and derive and use related equations for exponential discharge in a resistor-capacitor circuit, $I=I_{0}e^{-t/RC}$ and $V=V_{0}e^{-t/RC}$ and the corresponding log equations $\ln Q=\ln Q_{0}-\frac{t}{RC}$, $\ln I=\ln I_{0}-\frac{t}{RC}$ and $\ln V=\ln V_{0}-\frac{t}{RC}$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/104-be-able-to-use-the-equation-q-q-0-e-t-rc-and-derive-and-use-related-equations-for/)** | 26 | 18 | 75 | 2020–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/104-be-able-to-use-the-equation-q-q-0-e-t-rc-and-derive-and-use-related-equations-for/) |
| **[105 understand and use the terms magnetic flux density $B$, flux $\phi$ and flux linkage $N\phi$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/105-understand-and-use-the-terms-magnetic-flux-density-b-flux-phi-and-flux-linkage-n/)** | 14 | 12 | 37 | 2020–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/105-understand-and-use-the-terms-magnetic-flux-density-b-flux-phi-and-flux-linkage-n/) |
| **[106 be able to use the equation $F=Bqv\sin\theta$ and apply Fleming's left-hand rule to charged particles moving in a magnetic field](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/106-be-able-to-use-the-equation-f-bqv-sin-theta-and-apply-fleming-s-left-hand-rule-to/)** | 15 | 12 | 30 | 2020–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/106-be-able-to-use-the-equation-f-bqv-sin-theta-and-apply-fleming-s-left-hand-rule-to/) |
| **[107 be able to use the equation $F=BIl\sin\theta$ and apply Fleming's left-hand rule to current carrying conductors in a magnetic field](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/107-be-able-to-use-the-equation-f-bil-sin-theta-and-apply-fleming-s-left-hand-rule-to/)** | 27 | 19 | 68 | 2020–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/107-be-able-to-use-the-equation-f-bil-sin-theta-and-apply-fleming-s-left-hand-rule-to/) |
| **[108 understand the factors affecting the e.m.f. induced in a coil when there is relative motion between the coil and a permanent magnet](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/108-understand-the-factors-affecting-the-e-m-f-induced-in-a-coil-when-there-is/)** | 11 | 9 | 40 | 2020–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/108-understand-the-factors-affecting-the-e-m-f-induced-in-a-coil-when-there-is/) |
| **[109 understand the factors affecting the e.m.f. induced in a coil when there is a change of current in another coil linked with this coil](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/109-understand-the-factors-affecting-the-e-m-f-induced-in-a-coil-when-there-is-a/)** | 10 | 8 | 29 | 2020–2025 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/109-understand-the-factors-affecting-the-e-m-f-induced-in-a-coil-when-there-is-a/) |
| **[110 understand how to use Faraday's law to determine the magnitude of an induced e.m.f. and be able to use the equation that combines Faraday's and Lenz's laws $E=\frac{-d(N\phi)}{dt}$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/110-understand-how-to-use-faraday-s-law-to-determine-the-magnitude-of-an-induced-e-m/)** | 52 | 20 | 170 | 2020–2026 | [Open topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/110-understand-how-to-use-faraday-s-law-to-determine-the-magnitude-of-an-induced-e-m/) |

## Browse every topic question

- [92 understand that an electric field (force field) is defined as a region where a charged particle experiences a force](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/92-understand-that-an-electric-field-force-field-is-defined-as-a-region-where-a/) — 11 question items · 6 papers — 27 marks · 2020–2025
- [93 understand that electric field strength is defined as $E=\frac{F}{Q}$ and be able to use this equation](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/93-understand-that-electric-field-strength-is-defined-as-e-frac-f-q-and-be-able-to/) — 30 question items · 17 papers — 93 marks · 2020–2026
- [94 be able to use the equation $F=\frac{Q_{1}Q_{2}}{4\pi\epsilon_{0}r^{2}}$ for the force between two charges](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/94-be-able-to-use-the-equation-f-frac-q-1-q-2-4-pi-epsilon-0-r-2-for-the-force/) — 18 question items · 15 papers — 46 marks · 2020–2026
- [95 be able to use the equation $E=\frac{Q}{4\pi\epsilon_{0}r^{2}}$ for the electric field due to a point charge](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/95-be-able-to-use-the-equation-e-frac-q-4-pi-epsilon-0-r-2-for-the-electric-field-due/) — 12 question items · 11 papers — 23 marks · 2020–2026
- [96 know and understand the relation between electric field and electric potential](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/96-know-and-understand-the-relation-between-electric-field-and-electric-potential/) — 7 question items · 6 papers — 12 marks · 2021–2026
- [97 be able to use the equation $E=\frac{V}{d}$ for an electric field between parallel plates](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/97-be-able-to-use-the-equation-e-frac-v-d-for-an-electric-field-between-parallel/) — 24 question items · 17 papers — 75 marks · 2020–2026
- [98 be able to use $V=\frac{Q}{4\pi\epsilon_{0}r}$ for a radial field](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/98-be-able-to-use-v-frac-q-4-pi-epsilon-0-r-for-a-radial-field/) — 20 question items · 18 papers — 55 marks · 2020–2026
- [99 be able to draw and interpret diagrams using field lines and equipotentials to describe radial and uniform electric fields](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/99-be-able-to-draw-and-interpret-diagrams-using-field-lines-and-equipotentials-to/) — 25 question items · 18 papers — 51 marks · 2020–2026
- [100 understand that capacitance is defined as $C=\frac{Q}{V}$ and be able to use this equation](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/100-understand-that-capacitance-is-defined-as-c-frac-q-v-and-be-able-to-use-this/) — 22 question items · 17 papers — 50 marks · 2020–2026
- [101 be able to use the equation $W=\frac{1}{2}QV$ for the energy stored by a capacitor, be able to derive the equation from the area under a graph of potential difference against charge stored and be able to derive and use the equations $W=\frac{1}{2}CV^{2}$ and $W=\frac{1}{2}\frac{Q^{2}}{C}$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/101-be-able-to-use-the-equation-w-frac-1-2-qv-for-the-energy-stored-by-a-capacitor-be/) — 19 question items · 18 papers — 43 marks · 2020–2026
- [102 be able to draw and interpret charge and discharge curves for resistor capacitor circuits and understand the significance of the time constant $RC$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/102-be-able-to-draw-and-interpret-charge-and-discharge-curves-for-resistor-capacitor/) — 35 question items · 19 papers — 105 marks · 2020–2026
- [103 CORE PRACTICAL 11: Use an oscilloscope or data logger to display and analyse the potential difference (p.d.) across a capacitor as it charges and discharges through a resistor](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/103-core-practical-11-use-an-oscilloscope-or-data-logger-to-display-and-analyse-the/) — 3 question items · 3 papers — 5 marks · 2021–2026
- [104 be able to use the equation $Q=Q_{0}e^{-t/RC}$ and derive and use related equations for exponential discharge in a resistor-capacitor circuit, $I=I_{0}e^{-t/RC}$ and $V=V_{0}e^{-t/RC}$ and the corresponding log equations $\ln Q=\ln Q_{0}-\frac{t}{RC}$, $\ln I=\ln I_{0}-\frac{t}{RC}$ and $\ln V=\ln V_{0}-\frac{t}{RC}$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/104-be-able-to-use-the-equation-q-q-0-e-t-rc-and-derive-and-use-related-equations-for/) — 26 question items · 18 papers — 75 marks · 2020–2026
- [105 understand and use the terms magnetic flux density $B$, flux $\phi$ and flux linkage $N\phi$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/105-understand-and-use-the-terms-magnetic-flux-density-b-flux-phi-and-flux-linkage-n/) — 14 question items · 12 papers — 37 marks · 2020–2026
- [106 be able to use the equation $F=Bqv\sin\theta$ and apply Fleming's left-hand rule to charged particles moving in a magnetic field](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/106-be-able-to-use-the-equation-f-bqv-sin-theta-and-apply-fleming-s-left-hand-rule-to/) — 15 question items · 12 papers — 30 marks · 2020–2026
- [107 be able to use the equation $F=BIl\sin\theta$ and apply Fleming's left-hand rule to current carrying conductors in a magnetic field](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/107-be-able-to-use-the-equation-f-bil-sin-theta-and-apply-fleming-s-left-hand-rule-to/) — 27 question items · 19 papers — 68 marks · 2020–2026
- [108 understand the factors affecting the e.m.f. induced in a coil when there is relative motion between the coil and a permanent magnet](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/108-understand-the-factors-affecting-the-e-m-f-induced-in-a-coil-when-there-is/) — 11 question items · 9 papers — 40 marks · 2020–2026
- [109 understand the factors affecting the e.m.f. induced in a coil when there is a change of current in another coil linked with this coil](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/109-understand-the-factors-affecting-the-e-m-f-induced-in-a-coil-when-there-is-a/) — 10 question items · 8 papers — 29 marks · 2020–2025
- [110 understand how to use Faraday's law to determine the magnitude of an induced e.m.f. and be able to use the equation that combines Faraday's and Lenz's laws $E=\frac{-d(N\phi)}{dt}$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/electric-and-magnetic-fields/110-understand-how-to-use-faraday-s-law-to-determine-the-magnitude-of-an-induced-e-m/) — 52 question items · 20 papers — 170 marks · 2020–2026

## Other topics in WPH14

- [Further Mechanics 174 question items](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/further-mechanics/)
- [Nuclear and Particle Physics 278 question items](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-4-wph14/nuclear-and-particle-physics/)

## Topic question rules and edge cases

**How many subtopics does Electric and Magnetic Fields contain?**

This page lists 19 subtopics tagged to the current syllabus. They are ordered by syllabus number, then alphabetically, and each row opens a page of matching past-paper questions.

**How are the subtopic question and mark totals calculated?**

A multiple-choice question contributes one item and its marks to every subtopic it is tagged with. A structured question contributes one item per tagged part, and that part’s marks; untagged parts of the same question are not counted here. A part tagged to several subtopics therefore appears under each of them.

**Why do some subtopics have no numbered prefix?**

Practical-skills statements and some syllabus bullets are unnumbered. Numbered statements come first; unnumbered statements and ties are sorted alphabetically.

**Is the LaTeX rendered without JavaScript?**

Yes. Subtopics that contain formulas are converted to static KaTeX HTML during the build, and the KaTeX stylesheet is served from the same site.

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