Does the AP Physics C: Electricity & Magnetism 2025 paper come with solutions?

Yes. Every question on this AP Physics C: Electricity & Magnetism past paper includes a step-by-step solution, plus instant AI feedback when you attempt it on Kekkei.

AP Physics C: Electricity & Magnetism AP Physics C: Electricity & Magnetism Practice Test 2025

Q: Where can I find the AP Physics C: Electricity & Magnetism AP Physics C: Electricity & Magnetism question paper 2025?

The full AP Physics C: Electricity & Magnetism AP Physics C: Electricity & Magnetism 2025 (Model questions) question paper is available free on Kekkei. You can read every question online and attempt the paper under timed exam conditions.

Q: How many marks is the AP Physics C: Electricity & Magnetism AP Physics C: Electricity & Magnetism 2025 paper?

The AP Physics C: Electricity & Magnetism AP Physics C: Electricity & Magnetism 2025 paper carries 90 full marks and is meant to be completed in 90 minutes, across 10 questions.

Q: Is practising this AP Physics C: Electricity & Magnetism past paper free?

Yes — reading and attempting this AP Physics C: Electricity & Magnetism past paper on Kekkei is completely free.

AP Physics C: Electricity & MagnetismModel questions

90marks

90min

10questions

This is the official AP Physics C: Electricity & Magnetism AP Physics C: Electricity & Magnetism question paper for 2025, as set in the Model questions examination. It carries 90 full marks and a time allowance of 90 minutes, across 10 questions. On Kekkei you can attempt this AP Physics C: Electricity & Magnetism past paper online with a timer, get instant AI feedback and step-by-step solutions, and track the topics where you lose marks — completely free. Whether you are revising for your AP Physics C: Electricity & Magnetism AP Physics C: Electricity & Magnetism exam or solving previous years' question papers, this 2025 paper is a great way to practise under real exam conditions.

Level	AP Physics C: Electricity & Magnetism
Subject	AP Physics C: Electricity & Magnetism
Year	2025 BS
Exam session	Model questions
Full marks	90
Time allowed	90 minutes
Questions	10, all with step-by-step solutions

Multiple Choice

Select the best answer.

10 questions·1 mark each

1Multiple choice1 mark

Spherical shell radius $R$ , charge $+Q$ . $E$ at $r<R$ ?

a
$0$
b
$kQ/R^2$
c
$kQ/r^2$
d
$kQr/R^3$

Correct answer: a

0

Gauss: no enclosed charge inside shell, $E=0$ .

The correct answer is (a) 0.

electrostaticselectric-field

2Multiple choice1 mark

Cube in uniform field $\vec{E}=E_0\hat{x}$ . Total flux?

a
$0$
b
$E_0 a^2$
c
$2E_0 a^2$
d
$6E_0 a^2$

Correct answer: a

0

No enclosed charge. $\Phi=0$ .

The correct answer is (a) 0.

gauss-lawflux

3Multiple choice1 mark

Three $+q$ at equilateral triangle vertices (side $a$ ). Potential at center? (vertex-to-center $= a/\sqrt{3}$ )

a
$3kq/a$
b
$kq\sqrt{3}/a$
c
$kq/a$
d
$3\sqrt{3}kq/a$

Correct answer: d

3\sqrt{3}kq/a

$V=3kq/(a/\sqrt{3})=3\sqrt{3}kq/a$ .

The correct answer is (d).

electric-potentialpoint-charges

4Multiple choice1 mark

Capacitor $C$ . Dielectric $\kappa=3$ inserted. New capacitance?

a
$C/3$
b
$C$
c
$3C$
d
$9C$

Correct answer: c

3C

$C'=\kappa C=3C$ .

The correct answer is (c) $3C$ .

capacitanceparallel-plate

5Multiple choice1 mark

$R=10$ k $\Omega$ , $C=100\;\mu$ F. Time constant?

a
0.1 s
b
1 s
c
10 s
d
0.01 s

Correct answer: b

1 s

$\tau=RC=10^4\times10^{-4}=1$ s.

The correct answer is (b) 1 s.

circuitsrc-circuits

6Multiple choice1 mark

$B$ at distance $r$ from infinite wire with current $I$ ?

a
$\mu_0 I/(4\pi r)$
b
$\mu_0 I/r$
c
$\mu_0 I/(2\pi r)$
d
$\mu_0 I/(2\pi r^2)$

Correct answer: c

\mu_0 I/(2\pi r)

$B=\mu_0 I/(2\pi r)$ .

The correct answer is (c).

magnetic-fieldsbiot-savart

7Multiple choice1 mark

Loop radius 0.1 m, $B$ changes 0.5 to 2.0 T in 0.3 s. EMF?

a
$$0.01\pi $V$
b
$$0.05\pi $V$
c
$$0.5\pi $V$
d
$$0.15\pi $V$

Correct answer: b

$$0.05\pi $V$

$|\mathcal{E}|=\pi(0.01)(1.5/0.3)=0.05\pi$ V.

The correct answer is (b).

electromagnetic-inductionfaraday-law

8Multiple choice1 mark

Conducting sphere with $+Q$ . Where is charge?

a
Uniformly throughout volume
b
At the center
c
On surface and partially in volume
d
Entirely on the outer surface

Correct answer: d

Entirely on the outer surface

Excess charge on conductor in equilibrium resides on outer surface.

The correct answer is (d).

electrostaticsconductors

9Multiple choice1 mark

12 V battery, $4\;\Omega$ and $8\;\Omega$ in series. Voltage across $8\;\Omega$ ?

a
4 V
b
6 V
c
8 V
d
12 V

Correct answer: c

8 V

$I=12/12=1$ A. $V_8=8$ V.

The correct answer is (c) 8 V.

circuitskirchhoff-laws

10Multiple choice1 mark

500 turns, 0.5 m, 2 A. $B$ inside? ( $\mu_0=4\pi\times10^{-7}$ )

a
$2.51\times10^{-3}$ T
b
$1.26\times10^{-3}$ T
c
$6.28\times10^{-4}$ T
d
$5.03\times10^{-3}$ T

Correct answer: a

$2.51\times10^{-3}$ T

$B=\mu_0 nI=4\pi\times10^{-7}(1000)(2)\approx 2.51\times10^{-3}$ T.

The correct answer is (a).

magnetic-fieldssolenoid

Frequently asked questions

Where can I find the AP Physics C: Electricity & Magnetism AP Physics C: Electricity & Magnetism question paper 2025?: The full AP Physics C: Electricity & Magnetism AP Physics C: Electricity & Magnetism 2025 (Model questions) question paper is available free on Kekkei. You can read every question online and attempt the paper under timed exam conditions.
Does the AP Physics C: Electricity & Magnetism 2025 paper come with solutions?: Yes. Every question on this AP Physics C: Electricity & Magnetism past paper includes a step-by-step solution, plus instant AI feedback when you attempt it on Kekkei.
How many marks is the AP Physics C: Electricity & Magnetism AP Physics C: Electricity & Magnetism 2025 paper?: The AP Physics C: Electricity & Magnetism AP Physics C: Electricity & Magnetism 2025 paper carries 90 full marks and is meant to be completed in 90 minutes, across 10 questions.
Is practising this AP Physics C: Electricity & Magnetism past paper free?: Yes — reading and attempting this AP Physics C: Electricity & Magnetism past paper on Kekkei is completely free.