AP EAMCET · PHYSICS · Semiconductors
In a transistor circuit, when the base current is increased by 50 micro-amperes keeping the collector voltage fixed at 2 volts, the collector current increases by \(1 \mathrm{~mA}\). The current gain of the transistor is
- A \(20\)
- B \(40\)
- C \(60\)
- D \(80\)
Answer & Solution
Correct Answer
(A) \(20\)
Step-by-step Solution
Detailed explanation
Increase in base current \[ \Delta I_b=50 \mu \mathrm{A} \] Increase in collector current \(\Delta I_c=1 \mathrm{~mA}\) Current gain \(\beta=\frac{\Delta I_c}{\Delta I_b}=\frac{1 \times 10^{-3}}{50 \times 10^{-6}}=\frac{10^3}{50}=20\)
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