Embibe Experts Solutions for Chapter: Electromagnetic Induction and Alternating Current, Exercise 1: AP EAPCET 2019 (21-Apr Shift-2)

Assertion (A): It is more difficult to move a magnet into a coil with more loops
Reason (R): This is because emf induced in each current loop resists the motion of the magnet

Assertion (A): Magnetic flux is a vector quantity.
Reason (R): Value of magnetic flux can be positive negative or zero.

A bulb of resistance $280\Omega$ is supplied with a $200 \mathrm{V}$ $AC$ supply. What is the peak current?

Two inductors $A$ and $B$ when connected in parallel are equivalent to a single inductor of inductance $1.5 \mathrm{H}$, and when connected in series are equivalent to a single inductor of inductance $8 \mathrm{H}$. Find the difference in the inductances of $A$ and $B$.

A solenoid of length $60 \mathrm{cm}$ with $15$ turns per $\mathrm{cm}$ and area of cross section $4\times {10}^{-3}{ \mathrm{m}}^2$ completely surrounds another co-axial solenoid of same length and area of cross-section $2\times {10}^{-3}{ \mathrm{m}}^2$ with $40$ turns per $\mathrm{cm}$. Mutual inductance of the system is

A resonant frequency of a circuit is $f$. If the capacitance is made four times the initial value, then the resonant frequency will become

An electric generator is based on_____

An AC generator consists of a coil of $100$ turns and is of cross-sectional area $3{ \mathrm{m}}^2$. It is rotating at a constant angular speed of $60 \mathrm{rad} {\mathrm{s}}^{-1}$ in a uniform magnetic field of $0.04 \mathrm{T}$. Resistance of the coil is $360 \mathrm{\Omega }$. What is the maximum power dissipation in the coil?