In a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter was zero. The power factor of the load must be_______________?

Related Mcqs:

Which of the following essential features is possessed by an indicating instrument?

A. Deflecting device B. Controlling device C. Damping device D. All of the above...

The disc of an instrument using eddy current damping should be of________________?

A. conducting and magnetic material B. non-conducting and magnetic material C. conducting and non-magnetic material D. none of the above...

It is required to measure the true open circuit e.m.f. of a battery. The best device is_____________?

A. D.C. voltmeter B. Ammeter and a known resistance C. D.C. potentiometer D. None of the above...

Basically a potentiometer is a device for________________?

A. comparing two voltages B. measuring a current C. comparing two currents D. measuring a voltage E. none of the above...

In an Anderson bridge, the unknown inductance is measured in terms of_______________?

A. known inductance and resistance B. known capacitance and resistance C. known resistance D. known inductance...