3. Electricity and Magnetism

Electromagnetic Induction — Quiz

Test your understanding of electromagnetic induction with 5 practice questions.

Practice Questions

Question 1

Which of the following factors directly affects the magnitude of the induced emf in a coil according to Faraday’s law?

Question 2

A circular coil with 20 turns and a radius of $0.1 \, \text{m}$ is placed in a uniform magnetic field of $0.5 \, \text{T}$. The magnetic field is perpendicular to the plane of the coil and is reduced to zero uniformly in $0.2 \, \text{s}$. What is the magnitude of the induced emf in the coil?

Question 3

A bar magnet is moved into a coil with its north pole facing the coil. According to Lenz’s law, what will be the direction of the induced current in the coil as seen from the magnet’s side?

Question 4

Which of the following is a correct description of the relationship between the number of turns in a coil and the induced emf?

Question 5

A coil is rotated in a uniform magnetic field at a constant angular velocity. Which of the following best describes the variation of the induced emf with time?