A. as long as possible
B. as short as possible
C. neither too small not too large
D. very thick
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
A. Small range moving coil voltmeter
B. D.C. potentiometer
C. Small range thermocouple voltmeter
D. None of the above
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
A. battery
B. permanent magnet D.C. generator
C. AC. generator
D. any of the above
A. D.C. voltmeter
B. Ammeter and a known resistance
C. D.C. potentiometer
D. None of the above
A. moving iron instrument
B. moving coil instrument
C. dynamometer instrument
D. none of the above
A. ground fault on a cable
B. short circuit fault on a cable
C. both the ground fault and the short-circuit fault
D. none of the above
A. unity
B. 0.8 lagging
C. 0.8 leading
D. zero
A. An operating torque system
B. A braking device
C. Revolution registering device
D. All of the above