TS EAMCET · Physics · Semiconductors
Consider an amplifier circuit wherein a transistor is used in common emitter mode. The change in collector current and base current respectively are and A when a signal of is added to the base-emitter voltage. If the load resistance is , then power gain in the circuit is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(B)
Step-by-step Solution
Detailed explanation
Voltage gain is Av=∆V0∆Vi=∆Ic×RL∆Vi=4×10-3×10×10340×10-3=1000 Current gain is Ai=∆Ic∆Ib=4×10-320×10-6=200 ∴ P=Av×Ai=1000×200=2×105
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