KCET · Physics · Electrostatics
If \( \alpha \)-current gain of a transistor is \( 0.98 . \) What is the value of \( \beta \)-current gain of the transistor ?
- A \( 0.49 \)
- B (19
- C \( 4.9 \)
- D \( 55 \)
Answer & Solution
Correct Answer
(B) (19
Step-by-step Solution
Detailed explanation
For a transistor, \( \beta \)-current gain and \( \alpha \)-current gain are related as
\(\beta=\frac{\alpha}{1-\alpha}\)
Given, \( \alpha \)-current gain \( =0.98 \)
Therefore, \( \beta=\frac{0.98}{1-0.98}=\frac{0.98}{0.02}=49 \)
\( \beta \)-current gain of transistor is \( 49 \).
\(\beta=\frac{\alpha}{1-\alpha}\)
Given, \( \alpha \)-current gain \( =0.98 \)
Therefore, \( \beta=\frac{0.98}{1-0.98}=\frac{0.98}{0.02}=49 \)
\( \beta \)-current gain of transistor is \( 49 \).
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