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

Question

In an AC generator, a coil with N turns, all of the same area A and total resistance R, rotates with frequency ω in a magnetic field B. The maximum value of emf generated in the coil is: (A) N.A.B.R. ω (B) N.A.B (C) N.A.B.R (D) N.A.B. ω

Tardigrade Admin · Accepted Answer

The emf generated would be maximum when flux (cutting) would be maximum i.e., angle between area vector of coil and magnetic field is

0^{°}

. The emf generated is given by [as a function of time]

e = NB A ω cos ω t

\Rightarrow e_{ma x} = N A B ω

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

$N . A . B . R . ω$

$N . A . B$

$N . A . B . R$

$N . A . B . ω$

The emf generated would be maximum when flux (cutting) would be maximum i.e., angle between area vector of coil and magnetic field is $0^{°}$ . The emf generated is given by [as a function of time]
$e = NB A ω cos ω t$
$\Rightarrow e_{ma x} = N A B ω$

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

N.A.B.R.ω

N.A.B

N.A.B.R

N.A.B.ω