A. Open circuit
B. Short-circuit
E. Long
D. None of the above
A. few turns of thin wire
B. few turns of thick wire
C. many turns of thin wire
D. many turns of thick wire
A. a capackive reactance
B. an inductive reactance
C. a resistance increasing with voltage rise across the arc
D. a resistance decreasing with voltage rise across the arc
A. 100 microsecond
B. 50 millisecond
C. 0.5 sec
D. 0.1 sec
A. current carrying contacts called electrodes
B. arc extinguishers
C. circuits to break the system
D. transformers to isolate the two systems
E. any of the above
A. fuses
B. relays
C. fast switches
D. circuit breakers
A. delayed
B. instantaneous
C. both of the above
D. none of the above