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Month: December 2018

Which of the following is not associated with a p-n junction?

August 11, 2021December 19, 2018 by admin
Which of the following is not associated with a p-n junction?

A. junction capacitance
B. charge storage capacitance
C. depletion capacitance
D. channel length modulation

Categories Analog Electronics

In the breakdown region, a zener didoe behaves like a _______________source?

August 11, 2021December 19, 2018 by admin
In the breakdown region, a zener didoe behaves like a _______________source?

A. constant voltage
B. constant current
C. constant resistance
D. none of the above

Categories Semiconductor Diode

A zener diode is________________ device?

August 11, 2021December 19, 2018 by admin
A zener diode is________________ device?

A. a non-linear
B. a linear
C. an amplifying
D. none of the above

Categories Semiconductor Diode

Mains a.c. power is converrted into d.c. power for_________________?

August 11, 2021December 19, 2018 by admin
Mains a.c. power is converrted into d.c. power for_________________?

A. lighting purposes
B. heaters
C. using in electronic equipment
D. none of the above

Categories Semiconductor Diode

The ripple factor of a half-wave rectifier is_________________?

August 11, 2021December 19, 2018 by admin
The ripple factor of a half-wave rectifier is_________________?

A. 2
B. 1.21
C. 2.5
D. 0.48

Categories Semiconductor Diode

The maximum efficiency of a half-wave rectifier is _____________?

August 11, 2021December 19, 2018 by admin
The maximum efficiency of a half-wave rectifier is _____________?

A. 40.6 %
B. 81.2 %
C. 50 %
D. 25 %

Categories Semiconductor Diode

For the same secondary voltage, the output voltage from a centre-tap rectifier is___________ than that of bridge rectifier?

August 11, 2021December 19, 2018 by admin
For the same secondary voltage, the output voltage from a centre-tap rectifier is___________ than that of bridge rectifier?

A. twice
B. thrice
C. four time
D. one-half

Categories Semiconductor Diode

IC = [a / (1 – a )] IB +_____________?

August 11, 2021December 19, 2018 by admin
IC = [a / (1 – a )] IB +_____________?

A. ICEO
B. ICBO
C. IC
D. (1 – a ) IB

Categories TRANSISTORS

A half-wave rectifier has an input voltage of 240 V r.m.s. If the step-down transformer has a turns ratio of 8:1, what is the peak load voltage? Ignore diode drop?

August 11, 2021December 19, 2018 by admin
A half-wave rectifier has an input voltage of 240 V r.m.s. If the step-down transformer has a turns ratio of 8:1, what is the peak load voltage? Ignore diode drop?

A. 27.5 V
B. 86.5 V
C. 30 V
D. 42.5 V

Categories Semiconductor Diode

IC = ß IB +__________?

August 11, 2021December 19, 2018 by admin
IC = ß IB +__________?

A. ICBO
B. IC
C. ICEO
D. aIE

Categories TRANSISTORS
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