NumicornNumicornLearn, solve, progress

Electricity and Magnetism Practice Tests

These Grade 12 Science practice tests develop Electricity and Magnetism skills through charge, electric fields, potential, capacitors, circuits, magnetic fields, induction, alternating current, electromagnetic waves, and electrical safety.

Skills covered

  • Applying charge quantization, superposition, Gauss's law, conductors, equipotential surfaces, dipoles, and capacitors
  • Analyzing current, resistance, Ohm's law, Kirchhoff's rules, RC circuits, AC values, transformers, power, and real sources
  • Using Lorentz force, right-hand rules, solenoids, cyclotrons, magnetic dipoles, Hall effect, Biot–Savart law, and Ampère's law
  • Explaining Faraday's law, Lenz's law, motional emf, inductance, RLC resonance, impedance, phase, generators, and eddy currents
  • Interpreting Maxwell's ideas, electromagnetic waves, polarization, spectrum, MRI, grounding, GFCI protection, and multimeter safety

How to use these practice tests

Sketch the field, circuit, or motion before calculating. Mark current directions and potential changes, keep vector directions consistent, and use the explanations to connect formulas with conservation of charge, energy, and electromagnetic flux.

For more Grade 12 Science practice, return to the Grade 12 Science category.

Select a test

5 Tests
1. Test2. Test3. Test4. Test5. Test

3. Test

Grade 12 Electricity and Magnetism Practice Tests

Practice Grade 12 Science questions about electric charge, fields, capacitors, circuits, magnetic fields, induction, alternating current, electromagnetic waves, and electrical safety.

Choose the best answer. Draw field or circuit diagrams when useful, track signs and units, and identify the conservation law or field relationship involved.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

What is the magnetic part of the Lorentz force on a moving charge?

Please select an answer first.

Correct answer: A

The correct answer is F=qvBsin⁡θF=qvB\sin\theta.

  1. Identify the electricity and magnetism concept: Determine whether the question concerns charge, fields, circuits, magnetism, induction, alternating current, electromagnetic waves, or measurement.
  2. Apply the governing relationship: The magnetic force depends on charge, speed, magnetic field, and the angle between velocity and field.
  3. Check units and direction: The correct answer is F=qvBsin⁡θF=qvB\sin\theta.

The magnetic force depends on charge, speed, magnetic field, and the angle between velocity and field.

2. QuestionMultiple choice

What does the right-hand rule help determine?

Please select an answer first.

Correct answer: B

The correct answer is The direction of a magnetic field or force for a specified current or moving positive charge.

  1. Identify the electricity and magnetism concept: Determine whether the question concerns charge, fields, circuits, magnetism, induction, alternating current, electromagnetic waves, or measurement.
  2. Apply the governing relationship: Right-hand rules encode the cross-product directions used for currents, fields, velocities, and magnetic forces.
  3. Check units and direction: The correct answer is The direction of a magnetic field or force for a specified current or moving positive charge.

Right-hand rules encode the cross-product directions used for currents, fields, velocities, and magnetic forces.

3. QuestionMultiple choice

What is the magnetic field inside a long ideal solenoid proportional to?

Please select an answer first.

Correct answer: C

The correct answer is The current and the number of turns per unit length.

  1. Identify the electricity and magnetism concept: Determine whether the question concerns charge, fields, circuits, magnetism, induction, alternating current, electromagnetic waves, or measurement.
  2. Apply the governing relationship: For an ideal solenoid, the field magnitude is approximately (B=\mu_0 nI), where (n) is turns per unit length.
  3. Check units and direction: The correct answer is The current and the number of turns per unit length.

For an ideal solenoid, the field magnitude is approximately (B=\mu_0 nI), where (n) is turns per unit length.

4. QuestionMultiple choice

What is the purpose of a cyclotron?

Please select an answer first.

Correct answer: D

The correct answer is To accelerate charged particles using electric fields and guide them with magnetic fields.

  1. Identify the electricity and magnetism concept: Determine whether the question concerns charge, fields, circuits, magnetism, induction, alternating current, electromagnetic waves, or measurement.
  2. Apply the governing relationship: A cyclotron uses alternating electric acceleration and magnetic circular motion to increase particle energy.
  3. Check units and direction: The correct answer is To accelerate charged particles using electric fields and guide them with magnetic fields.

A cyclotron uses alternating electric acceleration and magnetic circular motion to increase particle energy.

5. QuestionMultiple choice

What torque acts on a magnetic dipole in a uniform magnetic field?

Please select an answer first.

Correct answer: A

The correct answer is τ=μBsin⁡θ\tau=\mu B\sin\theta.

  1. Identify the electricity and magnetism concept: Determine whether the question concerns charge, fields, circuits, magnetism, induction, alternating current, electromagnetic waves, or measurement.
  2. Apply the governing relationship: The magnetic dipole experiences a torque that tends to align its magnetic moment with the field.
  3. Check units and direction: The correct answer is τ=μBsin⁡θ\tau=\mu B\sin\theta.

The magnetic dipole experiences a torque that tends to align its magnetic moment with the field.

6. QuestionMultiple choice

What is the Hall effect?

Please select an answer first.

Correct answer: B

The correct answer is A transverse voltage produced when current flows through a conductor or semiconductor in a magnetic field.

  1. Identify the electricity and magnetism concept: Determine whether the question concerns charge, fields, circuits, magnetism, induction, alternating current, electromagnetic waves, or measurement.
  2. Apply the governing relationship: The magnetic force deflects moving charge carriers, creating a measurable transverse potential difference.
  3. Check units and direction: The correct answer is A transverse voltage produced when current flows through a conductor or semiconductor in a magnetic field.

The magnetic force deflects moving charge carriers, creating a measurable transverse potential difference.

7. QuestionMultiple choice

What does the Biot–Savart law calculate?

Please select an answer first.

Correct answer: C

The correct answer is The magnetic field contribution from a small current element.

  1. Identify the electricity and magnetism concept: Determine whether the question concerns charge, fields, circuits, magnetism, induction, alternating current, electromagnetic waves, or measurement.
  2. Apply the governing relationship: Biot–Savart law integrates contributions from current elements to find the magnetic field.
  3. Check units and direction: The correct answer is The magnetic field contribution from a small current element.

Biot–Savart law integrates contributions from current elements to find the magnetic field.

8. QuestionMultiple choice

What does Ampère's law relate in a suitable symmetric situation?

Please select an answer first.

Correct answer: D

The correct answer is The circulation of magnetic field around a closed path to the enclosed current.

  1. Identify the electricity and magnetism concept: Determine whether the question concerns charge, fields, circuits, magnetism, induction, alternating current, electromagnetic waves, or measurement.
  2. Apply the governing relationship: Ampère's law relates (\oint mathbf{B}\cdot d\mathbf{l}) to current and is especially useful with symmetry.
  3. Check units and direction: The correct answer is The circulation of magnetic field around a closed path to the enclosed current.

Ampère's law relates (\oint mathbf{B}\cdot d\mathbf{l}) to current and is especially useful with symmetry.

9. QuestionMultiple choice

What is magnetic flux?

Please select an answer first.

Correct answer: A

The correct answer is The surface integral of the magnetic field through an area.

  1. Identify the electricity and magnetism concept: Determine whether the question concerns charge, fields, circuits, magnetism, induction, alternating current, electromagnetic waves, or measurement.
  2. Apply the governing relationship: Magnetic flux measures how much magnetic field passes through a surface and depends on field, area, and orientation.
  3. Check units and direction: The correct answer is The surface integral of the magnetic field through an area.

Magnetic flux measures how much magnetic field passes through a surface and depends on field, area, and orientation.

10. QuestionMultiple choice

What happens to a charged particle moving exactly parallel to a uniform magnetic field?

Please select an answer first.

Correct answer: B

The correct answer is The magnetic force is zero.

  1. Identify the electricity and magnetism concept: Determine whether the question concerns charge, fields, circuits, magnetism, induction, alternating current, electromagnetic waves, or measurement.
  2. Apply the governing relationship: Because (F=qvB\sin\theta) and (\theta=0), the magnetic force vanishes and the particle continues straight if no other force acts.
  3. Check units and direction: The correct answer is The magnetic force is zero.

Because (F=qvB\sin\theta) and (\theta=0), the magnetic force vanishes and the particle continues straight if no other force acts.

Previous testNext test