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- Subject
- Measurement and Instrumentationelectrical-engineering-mcqs › measurement-and-instrumentation
- Published
- 23 Dec 2018
- Last updated
- 28 May 2026
Explanation
When both wattmeters in the two-wattmeter method display equal values, it indicates that the load power factor is unity (1). This is because equal readings occur only when the phase angle between voltage and current is zero, corresponding to a power factor of one.
More Measurement and Instrumentation MCQs
Practice related questions from the same subject.
- 1.What term describes the ratio between the maximum displacement error and the full-scale deflection of an instrument?
- 2.What characteristic defines a multirange instrument?
- 3.What fundamental principle does a vector voltmeter operate on?
- 4.What is the purpose of the braking torque in an energy meter?
- 5.What is the minimum number of wattmeter elements required to measure the power in an n-phase system?
- 6.What parameter can be assessed with the help of a vector voltmeter?
- 7.Which of the following are common calibrations applied to an energy meter?
- 8.Instrument transformers are primarily utilized to increase the measurement range of which type of instrument?
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