AP EAMCET · PHYSICS · Semiconductors
In common emitter amplifier of a transistor, if the ratio of the voltage gain and current amplification factor is 4, then the ratio of the collector and base resistances is
- A \(16 :1\)
- B \(1 :16\)
- C \(1 :4\)
- D \(4 :1\)
Answer & Solution
Correct Answer
(D) \(4 :1\)
Step-by-step Solution
Detailed explanation
\(A_v = \beta \frac{R_c}{R_b}\) \(\frac{A_v}{\beta} = \frac{\beta \frac{R_c}{R_b}}{\beta} = \frac{R_c}{R_b}\) \(\frac{R_c}{R_b} = 4\) Ratio: \(4:1\)
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