Electronics - Transistors and Applications

Exercise :: Transistors and Applications - General Questions

6. 

The signal voltage gain of an amplifier, Av, is defined as:

A. mca17_1003a1.gif
B. Av = IC × RC
C. mca17_1003c1.gif
D. mca17_1003d1.gif

Answer: Option C

Explanation:

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7. 

In a class B push-pull amplifier, the transistors are biased slightly above cutoff to avoid

A. crossover distortion
B. unusually high efficiency
C. negative feedback
D. a low input impedance

Answer: Option A

Explanation:

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8. 

The depletion-mode MOSFET

A. can operate with only positive gate voltages
B. can operate with only negative gate voltages
C. cannot operate in the ohmic region
D. can operate with positive as well as negative gate voltages

Answer: Option D

Explanation:

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9. 

Three different points are shown on a dc load line. The upper point represents the

A. minimum current gain
B. quiescent point
C. saturation point
D. cutoff point

Answer: Option C

Explanation:

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10. 

Which of the following conditions are needed to properly bias an npn transistor amplifier?

A. Forward bias the base/emitter junction and reverse bias the base/collector junction.
B. Forward bias the collector/base junction and reverse bias the emitter/base junction.
C. Apply a positive voltage on the n-type material and a negative voltage on the p-type material.
D. Apply a large voltage on the base.

Answer: Option A

Explanation:

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