A. deflecting
B. controlling
C. damping
D. any of the above
Related Mcqs:
- 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 resistance in the circuit of the moving coil of a dynamometer wattmeter should be_____________?
A. almost zero
B. low
C. high
D. none of the above - In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at_____________?
A. 0°
B. 60°
C. 90°
D. 120° - In Weston synchronoscope the moving coil is connected across______________?
A. bus-bars
B. incoming alternator
C. fixed coils
D. any of the above - The spring material used in a spring control device should have the following property?
A. Should be non-magnetic
B. Most be of low temperature co-efficient
C. Should have low specific resistance
D. Should not be subjected to fatigue
E. All 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 - Wagner earthing device is used to eliminate errors due to________________?
A. electrostatic coupling
B. electromagnetic coupling
C. both A. and B.
D. none of the above - When a capacitor was connected to the terminal of ohmmeter, the pointer indicated a low resistance initially and then slowly came to infinity position. This shows that capacitor is____________?
A. short-circuited
B. all right
C. faulty
