Embibe Experts Solutions for Chapter: Electromagnetic Induction, Exercise 9: Exercise (Conceptual Questions)

When the current through a solenoid increases at a constant rate, the induced current

The time constant of an inductance coil is $2.0\times {10}^{-3} \mathrm{s}$. When a $90 \mathrm{\Omega }$ resistance is joined in series, the time constant becomes $0.5\times {10}^{-3} \mathrm{s}$. The inductance and resistance of the coil are

Energy is stored in the choke coil in the form of-

A coil of resistance $10 \mathrm{\Omega }$ and an inductance $5 \mathrm{H}$ is connected to a $100 \mathrm{V}$ battery. The energy stored in the coil is,

A small square loop of wire of side $l$ is placed inside a large square loop of wire of side $L\left(L>>l\right)$. The loops are coplanar and their centres coincide. The mutual inductance of the system is proportional to 

In order to avoid eddy currents in the core of a transformer :-

The mutual inductance of two coils when magnetic flux changes by $2\times {10}^{-2} Wb$ and current changes by $.01 A$ is :-

A semicircle loop PQ of radius ’R’ is moved with velocity ’v’ in transverse magnetic field as shown in figure. The value of induced emf. between the ends of loop is :