ISRO Electrical Engineering (EE) 2018 - Question 69

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The pressure coil of a dynamometer type wattmeter is

  • A. Highly inductive
  • B. Highly resistive
  • C. Purely resistive
  • D. Purely inductive

Answer: B. Highly resistive

Explanation: The pressure coil of an electrodynamometer wattmeter is designed to be highly resistive (connected in series with a large non-inductive resistor) to keep its current in phase with voltage.

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