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Month: December 2018

If voltage feedback (negative) is applied to an amplifier, its output impedance ______________?

August 11, 2021December 19, 2018 by admin
If voltage feedback (negative) is applied to an amplifier, its output impedance ______________?

A. Remains the same
B. Is increased
C. Is decreased
D. None of the above

Categories Amplifiers with Negative Feedback

The voltage gain of an emitter follower is _____________?

August 11, 2021December 19, 2018 by admin
The voltage gain of an emitter follower is _____________?

A. Much less than 1
B. Approximately equal to 1
C. Greater than 1
D. None of the above

Categories Amplifiers with Negative Feedback

The collector-base junction in a transistor has___________?

August 11, 2021December 19, 2018 by admin
The collector-base junction in a transistor has___________?

A. forward bias at all times
B. reverse bias at all times
C. low resistance
D. none of the above

Categories TRANSISTORS

A heat sink is generally used with a transistor to______________?

August 11, 2021December 19, 2018 by admin
A heat sink is generally used with a transistor to______________?

A. increase the forward current
B. decrease the forward current
C. compensate for excessive dog
D. prevent excessive temperature rise

Categories TRANSISTORS

Emitter follower is used for ________________?

August 11, 2021December 19, 2018 by admin
Emitter follower is used for ________________?

A. Current gain
B. Impedance matching
C. Voltage gain
D. None of the above

Categories Amplifiers with Negative Feedback

In a transistor, signal is transferred from a___________circuit?

August 11, 2021December 19, 2018 by admin
In a transistor, signal is transferred from a___________circuit?

A. high resistance to low resistance
B. low resistance to high resistance
C. high resistance to high resistance
D. low resistance to low resistance

Categories TRANSISTORS

The gain of an amplifier without feedback is 100 db. If a negative feedback of 3 db is applied, the gain of the amplifier will become______________?

August 11, 2021December 19, 2018 by admin
The gain of an amplifier without feedback is 100 db. If a negative feedback of 3 db is applied, the gain of the amplifier will become______________?

A. 5 db
B. 300 db
C. 103 db
D. 97 db

Categories Amplifiers with Negative Feedback

A transistor is connected in CB mode. If it is not connected in CE mode with same bias voltages, the values of IE, IB and IC will____________?

August 11, 2021December 19, 2018 by admin
A transistor is connected in CB mode. If it is not connected in CE mode with same bias voltages, the values of IE, IB and IC will____________?

A. remain the same
B. increase
C. decrease
D. none of the above

Categories TRANSISTORS

When current feedback (negative) is applied to an amplifier, its output impedance ________________?

August 11, 2021December 19, 2018 by admin
When current feedback (negative) is applied to an amplifier, its output impedance ________________?

A. Is increased
B. Is decreased
C. Remains the same
D. None of the above

Categories Amplifiers with Negative Feedback

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

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

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

Categories TRANSISTORS
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