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Question

The expression for the induced emf generated in a coil as a result of change in magnetic flux linked with it


A
e=AdBdt
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B
e=BdAdt
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C
e=ddt(A.B)
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D
e=ddt(A×B)
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Solution

The correct option is A $$\displaystyle e = \frac{d}{dt} (\vec A . \vec B)$$
$$emf = \dfrac{d flux}{dt}$$
$$ = \dfrac{ d ( \vec A .\vec B)}{dt} $$

Physics

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