MHT CET · Physics · Semiconductors
In an n-p-n transistor amplifier, the collector current is 9 mA . If \(90 \%\) of the electrons emitted reach the collector, then
- A \(\alpha=9, \beta=0.9\)
- B \(\alpha=0.9, \beta=90\)
- C \(\alpha=0.9, \beta=9\)
- D \(\alpha=90, \beta=0.9\)
Answer & Solution
Correct Answer
(C) \(\alpha=0.9, \beta=9\)
Step-by-step Solution
Detailed explanation
\(\alpha = \frac{I_C}{I_E} = 0.90\) \(\beta = \frac{\alpha}{1 - \alpha} = \frac{0.9}{1 - 0.9} = \frac{0.9}{0.1} = 9\)
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