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Reverse Bias

The collector...

Question

The collector current in a transistor circuit is $2.9 m A$ . If base current is $100 μ A$ . $α$ of the transistor is:

A

0.06

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B

0.77

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C

0.97

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D

0.87

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Solution

The correct option is C $0.97$
Given that:
$I_{c} = 2.9 m A$
$I_{b} = 100 μ A = 0.1 m A$
For transistors,
$I_{e} = I_{b} + I_{c}$
$I_{e} = 0.1 + 2, 9 = 3 m A$
Hence,
$α = \frac{I_{c}}{I_{e}}$
$α = \frac{2.9}{3} = 0.9666 \approx 0.97$

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