The coil in an ac generator consists of 21 turns of wire, each of area a = 0.12 m2, and the total resistance of the wire is 24 ohms. the coil rotates in a 0.5 tesla magnetic field at a constant frequency of 135 hz. find the maximum induced emf in the coil (in volts).

1068.23 V

Explanation:

number of turn, N = 21

Area, A = 0.12 m^2

Resistance, R = 24 ohm

Magnetic field, B = 0.5 Tesla

Frequency, f = 135 Hz

The maximum induced emf is given by

e = N x B x A x ω

e = N x B x A x 2 x π x f

e = 21 x 0.5 x 0.12 x 2 x 3.14 x 135

e = 1068.23 V

Thus, the induced emf is 1068.23 V.

the answer is b ) square root of 5

d eras and periods