Embibe Experts Solutions for Chapter: Electromagnetic Induction, Exercise 1: COMEDK UGET 2014

An aeroplane is flying horizontally with a velocity of $360 \mathrm{km}/\mathrm{h}.$ The distance between the tips of the wings of the aeroplane is $50 m.$ The vertical component of the earth's magnetic field is $4\times {10}^{-4}\mathrm{wb}/{\mathrm{m}}^2.$ The induced e.m.f. is

The normal magnetic flux passing through a coil changes with time according to the equation $\mathrm{\varphi }=6t^2-5t+1.$ What is the magnitude of the induced current at $t=0.235 \mathrm{s}$ and resistance $10 \mathrm{\Omega }?$

A bicycle generator creates $1.5 \mathrm{V}$ at $15 \mathrm{km} {\mathrm{h}}^{-1}$. The EMF generated at $10 \mathrm{km} {\mathrm{h}}^{-1}$ is:

A coil of wire of $1000$ turns has self inductance $120$ millihenry. The self inductance of a coil $250$ turn is

If a change in current of $0.01 A$ in one coil produces a change in magnetic flux $2\times {10}^{-2}$ weber in another coil, then the mutual inductance between coils is

The inductance in a coil plays the same role as

The mutual inductance between two coils depends upon

The instantaneous voltage of a $50 \mathrm{Hz}$ generator giving peak voltage as $300 \mathrm{V}.$ The generator equation for this voltage is