The pressure coil of a wattmeter should be connected on the supply side of the current coil when______________?

A. Load impedance is high
B. Load impedance is low
C. Supply voltage is low
D. None of the above

The adjustment of position of shading bands, in an energy meter is done to provide______________?

A. Friction compensation
B. Creep compensation
C. Braking torque
D. None of the above

For measuring a very high resistance we should use_______________?

A. Kelvin’s double bridge
B. Wheat stone bridge
C. Meggar
D. None of the above

The operating voltage of a meggar is about_______________?

A. 6 v
B. 12 v
C. 40 v
D. 100 v

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

In order to achieve high accuracy, the slide wire of a potentiometer should be_______________?

A. As long as possible
B. As short as possible
C. Neither too small not too large
D. Very thick

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

Which of the following devices should be used for accurate measurement of low D.C. voltage ?

A. Small range moving coil voltmeter
B. D.c. potentiometer
C. Small range thermocouple voltmeter
D. None of the above

To measure a resistance with the help of a potentiometer it is_________________?

A. Necessary to standardise the potentiometer
B. Not necessary to standardise the potentiometer
C. Necessary to use a volt ratio box in conjunction with the potentiometer
D. None of the above

The electrical power to a meggar is provided by________________?

A. Battery
B. Permanent magnet d.c. generator
C. Ac. generator
D. Any of the above