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Reverse Bias

In a transist...

Question

In a transistor $(β = 50)$ the voltage $5 k Ω$ load resistance in collector circuit is $5 V$ . The base current is.

A

0.02 m A

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B

0.03 m A

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C

0.08 m A

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D

0.09 m A

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Solution

The correct option is A $0.02 m A$
Given,
$β = 50$
$R_{C} = 5 k Ω$
$V_{C} = 5 V$
Collector voltage, $V_{C} = I_{C} R_{C}$
$I_{C} = \frac{V_{C}}{R_{C}} = \frac{5}{5 \times 10^{3}} = 1 m A$
Base current, $I_{B} = \frac{I_{C}}{β} = \frac{1 m A}{50} = 0.02 m A$
The correct option is A.

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