Question68:-A DC current source has a short circuit current of 4 mA and an open-circuit voltage of 20 V. The internal
resistance is
A:-5 KO
8:-100೧
C:-4 KQ
D:-100 KQ
Correct Answer:- Option-A
Question69:-The overall gain of RC coupled amplifier is small due to
A:-Large bandwidth
B:-Loading effect of successive stages
C:-Impedance of capacitor
D:-None of these
Correct Answer:- Option-B
Question70:-Intrinsic standoff ratio is the characteristics of
A:-Semi-conductor
B:-Tunnel diode
C:-FET
D:-UT
Correct Answer:- Option-D
Question71:-Stability of a circuit increases with
A:-Positive feedback
B:-Negative feedback
:-Current series feedback
D:-Both (1) and (2)
Correct Answer:- Option-B
Question72:-An emitter follower is
A:-Current series feedback circuit
B:-Voltage series feedback circuit
C:-Both (1) and (2)
D:-None of these
Correct Answer:- Option-A
Question73:-The output frequency of a crystal oscillator is stable because of
A:-High Q of the crystal
-Low XL/R Ratio
C:-Rigid Crystal Structure
D:-Small size
Correct Answer:- Option-A
Question74:-An Ideal Op-Amp has
A:-Zero output resistance
B:-Infinite Voltage gain
C:-Infinite input impedance
D:-Alll of these
Correct Answer:- Option-D
Question75:-An example for wave shaping circuit is
A:-Astable Multi-vibrator
B:-RC Relaxation oscillator
C:-Schmitt Trigger
D:-None of these
Correct Answer:- Option-C
Question76:-Number of diodes in a bridge rectifier is
൧-2
-4
6-1
D:-None of these
Correct Answer:- Option-B
Question77:-Bucking voltage is another name for
A:-Back emf
-Breakdown voltage
C:-Saturation voltage