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Calculate the reactive power in an 84 MΩ resistor.

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Calculate the reactive power in an 84 MΩ resistor.

(a) 1.47 VAR

(b) 45.6 VAR

(c) 0.59 VAR

(d) 0 VAR

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The query is from Induction Motors in section Speed Control of Direct Current Motors & Induction Motors of Electric Drives

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The correct choice is (d) 0 VAR

The 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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