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Calculate the reactive power in a 451.26 Ω resistor.

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in Electric Drives by (99.8k points)
Calculate the reactive power in a 451.26 Ω resistor.

(a) 1 VAR

(b) .6 VAR

(c) 0 VAR

(d) .9 VAR

This question was addressed to me in an internship interview.

Question is taken from Induction Motors topic in section Speed Control of Direct Current Motors & Induction Motors of Electric Drives

1 Answer

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Best answer
The correct choice is (c) 0 VAR

The best 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.

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