A. potential transformers
B. current transformers
C. both A. and B.
D. power transformers
Related Mcqs:
- Operating torques in analogue instruments are_______________?
A. deflecting and control
B. deflecting and damping
C. deflecting, control and damping
D. vibration and balancing - Commonly used instruments in power system measurement are_______________?
A. induction
B. moving coil or iron
C. rectifier
D. electrostatic - 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 - A moving-coil permanent-magnet instrument can be used as ____________by using a low resistance shunt?
A. ammeter
B. voltmeter
C. flux-meter
D. ballistic galvanometer - A moving-coil permanent-magnet instrument can be used as flux-meter_____________?
A. by using a low resistance shunt
B. by using a high series resistance
C. by eliminating the control springs
D. by making control springs of large moment of inertia - 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 - The pointer of an indicating instrument should be______________?
A. very light
B. very heavy
C. either A. or B.
D. neither A. nor B. - The scale of a rectifier instrument is_________________?
A. linear
B. non-linear
C. either A. or B.
D. neither A. nor B. - The gravity controlled instrument has crowded scale because current is proportional to________________?
A. balancing weight
B. deflection angle
C. sine of deflection angle - If an instrument has cramped scale for larger values, then it follows________________?
A. square law
B. logarithmic law
C. uniform law
D. none of the above
