Faraday's Law — Prelims Questions

A circular coil of radius $10\,\text{cm}$ and 500 turns is placed in a uniform magnetic field of $0.2\,\text{T}$ perpendicular to the plane of the coil. The magnetic field is then reversed in direction in $0.1\,\text{s}$. What is the magnitude of the average induced EMF in the coil?

A conducting rod of length $L$ is moved with a constant velocity $v$ perpendicular to a uniform magnetic field $B$. Which of the following statements is true regarding the induced EMF?

A square loop of side $a$ is moving with a velocity $v$ into a uniform magnetic field $B$ perpendicular to its plane. The magnetic field exists only for a width $W > a$. What is the magnitude of the induced EMF in the loop as it enters the field?

A coil has an area of $0.05\,\text{m}^2$ and has 80 turns. The magnetic field perpendicular to the coil is $0.04\,\text{T}$. If the coil is removed from the field in $0.2\,\text{s}$, the average induced EMF is:

A square loop of wire of side $L$ is rotated at a constant angular velocity $\omega$ in a uniform magnetic field $B$ that is perpendicular to the axis of rotation. The axis of rotation is perpendicular to the magnetic field. What is the instantaneous induced EMF in the loop?

A bar magnet is moved towards a stationary conducting loop. The direction of the induced current in the loop, as viewed from the magnet, will be such that it: