A coil having an inductance of $0.5\,\,H$ carries a current which is uniformly varying from zero to ${\rm{10}}\,\,{\rm{ampere}}$ in ${\rm{2}}\,\,{\rm{second}}$. The e.m.f. (in volts) generated in the coil is

JEE PHYSICS MCQ: ELECTRO MAGNETIC INDUCTION

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Application +4 | -1

A coil having an inductance of

0.5\,\,H

carries a current which is uniformly varying from zero to

\mathrm{10}\,\,\mathrm{ampere}

\mathrm{2}\,\,\mathrm{second}

. The e.m.f. (in volts) generated in the coil is

View answer and explanation

Correct option: C

2.5

Option C (2.5) is correct because it is calculated using the formula for induced EMF in an inductor.

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R

n

i=i_0 \sin \omega t

N

4 \mathrm{sec}

0.1\,\,{m^2}

\mathrm{60}

\mathrm{0}\mathrm{.4}\,\,\mathrm{T}

\mathrm{100}

\mathrm{50}\,\,\mathrm{mH}

\mathrm{2 A}