B:-Drain current becomes zero
C:-All free charges get removed from the channel
D:-Avalanche break down takes place
Correct Answer:- Option-C

Question28:-Compared to bipolar transistor, a JFET has
A:-Higher input impedance and low voltage gain
B:-Lower input impedance and high voltage gain
C:-Higher input impedance and high voltage gain
D:-Lower input impedance and low voltage gain
Correct Answer:- Option-A

Question29:-Class AB operation is operation.

D:-none of the above
Correct Answer:- Option-D
Question30:-The ripple factor of a full-wave rectifier circuit compared to that of a half wave rectifier circuit without filter is
A:-Half of that for a half wave rectifier
B:-Less than half that for a half-wave rectifier circuit
C:-Equal to that of a half wave rectifier
D:-None of the above
Correct Answer:- Option-B
Question31:-A capacitor is fully charged when
A:-The voltage across its plates is half of the voltage from ground to one of its plates
B:-The current through the capacitor is the same as when the capacitor is discharged
C:-The voltage across the plates is 0.707 of the input voltage
D:-The current through the capacitor is directly proportional to the area of the plates
Correct Answer:- Option-B
Question32:-The saturation condition of transistor implies that
A:-Collector current has highest possible value
B:-Entire Vcc gets dropped across load resistor
C:-It acts as a closed switch with negligible value of resistance
D:-All of the above
Correct Answer:- Option-D
Question33:-The output of a particular Op-amp increases 8V in 12'mu’ s. The slew rate is
‏90-:ھ‎ ۷/۳۸۷" 5
B:-0.67 V/'mu’ s
‏15:٤‎ ۷۲۳۷5
D:-None of these
Correct Answer:- Option-B
Question34:-With zero volts on both inputs, an Op-amp ideally should have an output
A:-Equal to the positive supply voltage
B:-Equal to the negative supply voltage
C:-Equal to zero
D:-Equal to CMRR
Correct Answer:- Option-C
Question35:-Determine the output resistance of differential amplifier with three op-amp. The op-amp used in 741c, withA =
200000 and "R _{0)". The output and difference of input voltages are 44 and 11.
A:-5.5 MQ
B:-3.5 MQ
C:-2.4 MQ
D:-1.5 MQ
Correct Answer:- Option-D
Question36:-The bandwidth of the differential amplifier increases, if the value of
A:-Open Loop Voltage Gain Decreases
B:-Closed Loop Voltage Gain Decreases
C:-Differential Voltage Gain Decreases
D:-All of the above
Correct Answer:- Option-B