Wattmeter cannot be designed on the principle of_________________?

Related Mcqs:

Which of the following properties a damping oil must possess ?

A. Must be a good insulator B. Should be non-evaporating C. Should not have corrosive action upon the metal of the vane D. The viscosity of the oil should not change with the temperature E. All of the above...

Which of the following instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured ?

A. Absolute instruments B. Indicating instruments C. Recording instruments D. Integrating instruments...

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...

In a Weston frequency meter, the magnetic axes of the two fixed coils are__________________?

A. parallel B. perpendicular C. inclined at 60° D. inclined at 120°...

The ratio of maximum displacement deviation to full scale deviation of the instrument is called_______________?

A. static sensitivity B. dynamic deviation C. linearity D. precision or accuracy...