Often a common-collector will be the last stage before the load; the main functi

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Question
Often a common-collector will be the last stage before the load; the main function of this stage is to
Options
A. provide voltage gain
B. buffer the voltage amplifiers from the low-resistance load
C. provide phase inversion
D. provide a high-frequency path to improve the frequency response

Correct Answer

buffer the voltage amplifiers from the low-resistance load

Transistors and Applications problems

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2. A transformer is plugged into a 120 V rms source and has a primary current of 300 mA rms. The secondary is providing 18 V across a 10 Ω load. What is the efficiency of the transformer?
Options
A. 88%
B. 90%
C. 92%
D. 95%

4. When does maximum power transfer happen from the source to the load?
Options
A. When the source resistance is greater than the load resistance
B. When the source resistance is less than the load resistance
C. When there is negligible source resistance
D. When the source resistance equals the load resistance

5.

What is the secondary voltage in the given circuit?
Options
A. 13.3 V rms in phase with the primary
B. 120 V rms in phase with the primary
C. 13.3 V rms out of phase with the primary
D. 120 V rms out of phase with the primary

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