Question

Calculate the reactive power in a 29.6 Ω resistor.

(a) 45.1 VAR

(b) 41.1 VAR

(c) 46 VAR

(d) 0 VAR

I had been asked this question in my homework.

I would like to ask this question from Induction Motors topic in section Speed Control of Direct Current Motors & Induction Motors of Electric Drives

Answer 1

The correct choice is (d) 0 VAR

Explanation: The resistor is a linear element. It only absorbs real power and dissipates it in the form of heat. The voltage and current are in the same phase in case of the resistor so the angle between V & I is 0°. Q=VIsin0° = 0 VAR.