Embibe Experts Solutions for Exercise 1: EXERCISE

A copper rod of length $l$ is rotating about mid-point of rod, perpendicular to the magnetic field $B$ with constant angular velocity $\mathrm{\omega }$. The induced emf between the two ends is

A semicircular loop of radius $R$ is rotated with an angular velocity $\mathrm{\omega }$ perpendicular to the plane of a magnetic field $B$ as shown in the figure. Emf induced in the loop is

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A force of $10 \mathrm{N}$ is required to move a conducting loop through a non-uniform magnetic field at $2{ \mathrm{ms}}^{-1}$. The rate of production of electrical energy (in watt) in loop is

A flexible wire bent in the form of a circle is placed in a uniform magnetic field perpendicular to the plane of the circle. The radius $r$ of circle changes with time $t$ as shown in the figure. The graph of magnitude of induced emf $\left|e\right|$ versus time in the circle is represented by

Radius of a circular loop placed in a perpendicular uniform magnetic field is increasing at a constant rate of $r_0{ \mathrm{ms}}^{-1}$. If at any instant radius of the loop is $r$, then emf induced in the loop at that instant will be

A conducting ring of radius $b$ is placed coaxially in a long solenoid of radius $a(b<a)$ having $n$ turns per unit length. A current $i=i_{0} \cos \omega t$ flows through the solenoid. The induced emf in the ring is

In what form is the energy stored in an inductor?

Which of the following pairs of coils has zero coupling constant?