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MHT CET202526 Apr 2025Evening ShiftPhysicsSemiconductorsActual

For a transistor, _ dc and _ dc are the current ratios, then the value of _ dc - _ dc _ dc _ dc

Options

  1. A2.5
  2. B2
  3. C1.5
  4. D1

Correct answer

D. 1

Step-by-step solution

The current gain parameters for a transistor, _ dc (common base current gain) and _ dc (common emitter current gain), are related by _ dc = _ dc 1 - _ dc and _ dc = _ dc 1 + _ dc . Given the expression _ dc - _ dc _ dc _ dc , simplify as follows: _ dc - _ dc _ dc _ dc = 1 _ dc - 1 _ dc Using _ dc = _ dc 1 + _ dc , take reciprocals: 1 _ dc = 1 + _ dc _ dc = 1 + 1 _ dc Substitute into the expression: (1 + 1 _ dc ) - 1 _ dc = 1 The value of the expression is 1 .

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