Electronics Engineering Objective Questions { BJT Amplifiers and Oscillators }

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183. A transistor converts

A. d.c. power into a.c. power

B. a.c. power into d.c. power

C. high resistance into low resistance

D. none of the above

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184. A transistor amplifier has high output impedance because

A. emitter is heavily doped

B. collector has reverse bias

C. collector is wider than emitter or base

D. none of the above

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185. For highest power gain, one would use configuration.

D. none of the above

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186. CC configuration is used for impedance matching because its

A. input impedance is very high

B. input impedance is low

C. output impedance is very low

D. one of the above

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187. A radio revceiver has of amplification.

C. three stages (d) more than three stages

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188. RC coupling is used for amplification

D. none of the above

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189. In an RC coupled amplifier, the voltage gain over mid-frequency range

A. changes abruptly with frequency

C. changes uniformly with frequency

D. none of the above

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