Question

Calculate the average value of the sinusoidal waveform x(t)=848sin(1.65πt+2π÷0.68).

(a) 0

(b) 78 V

(c) 15 V

(d) 85 V

The question was asked during a job interview.

I'm obligated to ask this question of Induction Motors Speed Control topic in portion Speed Control of Direct Current Motors & Induction Motors of Electric Drives

Answer 1

The correct choice is (a) 0

To explain I would say: Sinusoidal waveform is generally expressed in the form of V=Vmsin(Ωt+α) where Vm represents peak value, Ω represents angular frequency, α represents a phase difference. The average value of a sine wave is zero because of equal and opposite lobes areas.