Computer Programming MCQs

5739 MCQs  (Page 286 of 574)

For handling greater currents induction wattmeters are used in conjunction with______________?
A. Potential transformers
B. Current transformers
C. Power transformers
D. Either of the above
The chemical effect of current is used in ______________?
A. D.c. ammeter hour meter
B. D.c. ammeter
C. D.c. energy meter
D. None of the above
A potentiometer may be used for_________________?
A. measurement of resistance
B. measurement of current
C. calibration of ammeter
D. calibration of voltmeter
The function of shunt in an ammeter is to______________?
A. By pass the current
B. Increase the sensitivity of the ammeter
C. Increase the resistance of ammeter
D. None 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
In majority of instruments damping is provided by______________?
A. Fluid friction
B. Spring
C. Eddy currents
D. All of the above
Which of the following meters are not used on D.C. circuits______________?
A. Mercury motor meters
B. Commutator motor meters
C. Induction meters
D. None of the above