H.R.C. fuse, as compared to a rewirable fuse, has_________________?
(A) no ageing effect
(B) high speed of operation
(C) high rupturing capacity
(D) all of the above
An isolator is installed_____________?
(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
The two input terminals of an opamp are labeled as______________?
(A) High and low
(B) Positive and negative
(C) Inverting and non inverting
(D) Differential ans non differential
For an op-amp having differential gain Av and common-mode gain Ac the CMRR is given by___________?
(A) Av + Ac
(B) Av / Ac
(C) 1 + Av / AC.
(D) Ac / Av
Hysteresis is desirable in Schmitt-trigger, because______________?
(A) Energy is to be stored/discharged in parasitic capacitances
(B) Effects of temperature would be compensated
(C) Devices in the circuit should be allowed time for saturation and desaturation
(D) It would prevent noise from causing false triggering
An opamp has a slew rate of 5V/ S. the largest sine wave o/p voltage possible at a frequency of 1MHz is____________?
(A) 10 V
(B) 5 V
(C) 5V
(D) 5/2 V
The approximate input impedance of the opamp circuit which has Ri=10k, Rf=100k, RL=10k?
(A) ∞
(B) 120k
(C) 110k
(D) 10k
An amplifier using an opamp with slew rate SR=1v/sec has a gain of 40db.If this amplifier has to faithfully amplify sinusoidal signals from dc to 20KHz without introducing any slew-rate induced distortion, then the input signal level exceed_____________?
(A) 795mV
(B) 395mV
(C) 795mV
(D) 39.5mV