Question
An a.c. generator consists of a coil of 50 turns and area 2.5 m^{2} rotating at an angular speed of 60 rad s^{–1} in a uniform magnetic field of 0.30 T. The resistance of the circuit including that of the coil is 500 . Find the maximum current drawn from the generator.

4.0 A

4.5 A

3.5 A

None of these
easy
Solution
4.5 A
The maximum emf induced in the coil is given by
.
.
.
Hence the maximum current drawn from the generator is
.
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