Q40 / 88 · NTA Abhyas (JEE Main) 2020 · Physics · Semiconductors

In a transistor, the collector current varies by 0.49 mA and emitter current varies by 0.50 A . Current gain β measured is

  • Correct answer
    A
    49
  • B
    150
  • C
    99
  • D
    100

Solution

Given,

ΔIC=0.49  mA=0.49×10-3 A

ΔIE=0.50  mA=0.50×103 A

α=ΔICΔIE

β=α1-α=0.490.501-0.490.50

=49501-4950

=49×505050-49

β=49

Hence, the correct answer is option: 'A'.

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