Umakant Kondapure, Collin Fernandes, Nipun Bhatia, Vikram Bathula and, Ketki Deshpande Solutions for Chapter: Electromagnetic Induction, Exercise 2: Critical Thinking

A coil of area $A=0.5 {\mathrm{m}}^2$ is situated in a uniform magnetic field $B=4.0 \mathrm{Wb} {\mathrm{m}}^{-2}$ and makes an angle of $60°$ with respect to the magnetic field as shown in figure. The value of the magnetic flux through the area A would be equal to

A coil of $10$ turns and area $4\times {10}^{-2} {\mathrm{m}}^2$ is placed in a uniform magnetic field of flux density ${10}^{-2} \mathrm{T}.$ If it is removed completely in $0.5 \mathrm{s},$ then the e.m.f. induced in the coil is

A rod of length $1 \mathrm{m}$ translating at velocity $10 \mathrm{m}/\mathrm{s}$ makes an angle of $30°$ with its length in uniform magnetic field of strength $0.5 \mathrm{T}$ as shown in the figure. The e.m.f. induced in the rod is

Two different wire loops are concentric and lie in the same plane. The current in the outer loop (I) is clockwise and increases with time. The induced current in the inner loop

$\frac{2.5}{\pi } \mathrm{\mu F}$ capacitor and a $3000 \mathrm{\Omega }$ resistance are joined in series to an $\mathrm{a}.\mathrm{c}.$ source of $200 \mathrm{volt}$, and $50 {\sec }^{-1}$ frequency. The power factor of the circuit and the power dissipated in it will respectively

A square loop of side $a$ is rotating about its diagonal with angular velocity $\omega$ in a perpendicular magnetic field $B$. It has $10 \mathrm{turns}$. The $\mathrm{e}.\mathrm{m}.\mathrm{f}.$ induced is

Which one of the following curves represents the variation of impedance ($Z$) with frequency $f$ in series $\mathrm{LCR}$ circuit?

A metallic ring is attached to the wall of a room. When the north pole of a magnet is brought near it, the induced current in the ring will be