A. power frequencies
B. higher frequencies entering generator or transformer units
C. either of the above
D. none of the above
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. resistance, reactance or impedance
B. voltage and current
C. light intensity
D. temperature
E. all above
A. short transmission line
B. medium transmission line
C. long transmission line
D. medium and long transmission lines
A. zero
B. infinity
C. unity
D. none of the above
A. thermocouple
B. electronic and bimetallic
C. both (A) and (B)
D. none of the above
A. to operate the relay of circuit breaker
B. as a substitute for circuit breaker
C. always independent of the position of circuit breaker
D. generally on both sides of a circuit breaker