A. battery
B. permanent magnet D.C. generator
C. AC. generator
D. any of the above
Related Mcqs:
- In a meggar controlling torque is provided by______________?
A. spring
B. gravity
C. coil
D. eddy current - The operating voltage of a meggar is about_______________?
A. 6 V
B. 12 V
C. 40 V
D. 100 V - 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 - In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load was___________?
A. unity
B. 0.8 lagging
C. 0.8 leading
D. zero - 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_______________?
A. unity
B. 0.5
C. 0.3
D. zero - A direct current can be measured by________________?
A. a D.C. potentiometer directly
B. a D.C. potentiometer in conjunction with a standard resistance
C. a D.C. potentiometer in conjunction with a volt ratio box
D. none of the above - E.m.f. of a Weston cell is accurately measured by________________?
A. electrostatic voltmeter
B. hot wire voltmeter
C. isothermal voltmeter
D. electrodynamic voltmeter - In majority of instruments damping is provided by______________?
A. fluid friction
B. spring
C. eddy currents
D. all of the above - In a portable instrument, the controlling torque is provided by_____________?
A. spring
B. gravity
C. eddy currents
D. all 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°
