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  4. The magnetic flux through a coil varies with time t as shown in the diagram. Which graph best represents the variation of the e.m.f. E induced in the coil with time t ?

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Q. The magnetic flux through a coil varies with time $t$ as shown in the diagram. Which graph best represents the variation of the e.m.f. $E$ induced in the coil with time $t ?$Physics Question Image

Electromagnetic Induction

Solution:

$\phi=A \sin \omega t$
$\varepsilon=-\frac{d \phi}{d t}=-A \omega \cos \omega t$

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