A. Not need an input resistor
B. Be virtual ground
C. Have high reverse current
D. Not invert the signal
A. Current controlled Current source
B. Current controlled voltage source
C. Voltage controlled voltage source
D. voltage controlled current source
A. Less than one
B. Greater than one
C. Of zero
D. Equal to one
A. The ratio of the input resistance to feedback resistance
B. The open-loop voltage gain
C. The feedback resistance divided by the input resistance
D. The input resistance
A. 1.273kHz
B. 12.73kHz
C. 127.3 kHz
D. 127.3 Hz
A. burning
B. arcing
C. melting
D. none of the above
A. no ageing effect
B. high speed of operation
C. high rupturing capacity
D. all 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
A. 20 A
B. 50 A
C. 100 A
D. 200 A
A. low currents circuits
B. low voltages circuits
C. high voltages and large currents circuits
D. all circuits