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Alternating Current and Voltage - Engineering

Q1:

The conductive loop on the rotor of a simple two-pole, single-phase generator rotates at a rate of 400 rps. The frequency of the induced output voltage is

A 40 Hz

B 100 Hz

C 400 Hz

D indeterminable

ANS:C - 400 Hz

rps=400*60=24000=Ns.

P = 2
Ns = 120f/p.
120*f/Ns*p.
f = Ns*p/120,
f = 24000*2/120,
f = 400.