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Month: December 2018

A constant current signal across a parallel RLC circuits gives an o/p of 1.4v at the signal frequency of 3.89KHZ and 4.1KHZ .At the frequency of 4KHZ,the o/p voltage will be___________?

August 11, 2021December 19, 2018 by admin
A constant current signal across a parallel RLC circuits gives an o/p of 1.4v at the signal frequency of 3.89KHZ and 4.1KHZ .At the frequency of 4KHZ,the o/p voltage will be___________?

A. 1 v
B. 2v
C. 1.4v
D. 2.8v

Categories Analog Electronics

In a p-n junction diode under reverse bias , the magnitude of electric field is maximum at_____________?

August 11, 2021December 19, 2018 by admin
In a p-n junction diode under reverse bias , the magnitude of electric field is maximum at_____________?

A. the edge of the depletion region on the p-side
B. the edge of the depletion region on the n-side
C. the p-n junction
D. the center of the depletion region on the n-side

Categories Analog Electronics

A change in the value of the emitter resistance Re in a differential amplifier?

August 11, 2021December 19, 2018 by admin
A change in the value of the emitter resistance Re in a differential amplifier?

A. affects the difference mode gain Ad
B. affects the common mode gain Ac
C.affects both Ad and Ac
D. does not effect either Ad and Ac

Categories Analog Electronics

Thermal runaway is not possible in FET because as the temperature of FET increases_________________?

August 11, 2021December 19, 2018 by admin
Thermal runaway is not possible in FET because as the temperature of FET increases_________________?

A. the mobility decreases
B. the transconductance increases
C. the drain current increases
D. none of the above

Categories Analog Electronics

A zener diode utilizes ______________ characteristics for its operation?

August 11, 2021December 19, 2018 by admin
A zener diode utilizes ______________ characteristics for its operation?

A. forward
B. reverse
C. both forward and reverse
D. none of the above

Categories Semiconductor Diode

If the a.c. input to a half-wave rectifier is an r.m.s value of 400/√2 volts, then diode PIV rating is__________________?

August 11, 2021December 19, 2018 by admin
If the a.c. input to a half-wave rectifier is an r.m.s value of 400/√2 volts, then diode PIV rating is__________________?

A. 400/√2 V
B. 400 V
C. 400 x √2 V
D. none of the above

Categories Semiconductor Diode

There is a need of transformer for__________________?

August 11, 2021December 19, 2018 by admin
There is a need of transformer for__________________?

A. half-wave rectifier
B. centre-tap full-wave rectifier
C. bridge full-wave rectifier
D. none of the above

Categories Semiconductor Diode

The disadvantage of a half-wave rectifier is that the__________________?

August 11, 2021December 19, 2018 by admin
The disadvantage of a half-wave rectifier is that the__________________?

A. components are expensive
B. diodes must have a higher power rating
C. output is difficult to filter
D. none of the above

Categories Semiconductor Diode

A zener diode has ______________ breakdown voltage?

August 11, 2021December 19, 2018 by admin
A zener diode has ______________ breakdown voltage?

A. undefined
B. sharp
C. zero
D. none of the above

Categories Semiconductor Diode

A series resistance is connected in the zener circuit to_______________?

August 11, 2021December 19, 2018 by admin
A series resistance is connected in the zener circuit to_______________?

A. properly reverse bias the zener
B. protect the zener
C. properly forward bias the zener
D. none of the above

Categories Semiconductor Diode
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