For a base current of 10 μA, what is the value of collector current in common emitter if βdc = 100

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VSSC ISRO Technical Assistant Electronics 8 Feb 2015 Official Paper
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  1. 10 μA
  2. 100 μA
  3. 1 mA
  4. 10 mA

Answer (Detailed Solution Below)

Option 3 : 1 mA
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Detailed Solution

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Concept:

For a transistor, the base current, the emitter current, and the collector current are related as:

IE = IB + IC

where IC = βIB

β = Current gain of the transistor

Calculation:

With β = 100, and IB = 10 μA

IC = βIB = 100 × 10 μA

IC = 1000 μA

IC = 1 mA

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