In an $AC$ generator, a coil with $N$ turns, all of the same area $A$ and total resistance $R,$ rotates with frequency $\omega $ in a magnetic field $B.$ The maximum value of $emf$ generated in the coil is
$N.A.B.R.$$\omega $
$N.A.B$
$N.A.B.R.$
$N.A.B.$$\omega $
Solution
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