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Low power factor wattmeters are designed to ________

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Low power factor wattmeters are designed to ________

(a) have a low torque

(b) have a high torque

(c) have a medium torque

(d) have no torque

The question was asked in an online interview.

My question is from Low Power Factor Wattmeter topic in chapter Measurement of Power and Related Parameters of Electrical Measurements

1 Answer

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Right answer is (a) have a low torque

Easy explanation: Low power factor wattmeters have a low value of control torque. They provide full scale deflection for low values of power factors of the order of 0.1.

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