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MHT CET202519 Apr 2025Morning ShiftPhysicsSemiconductorsActual

In the case of constant ' ' and ' ' of a transistor ( and are current ratios)

Options

  1. A1
  2. B>1, < 1
  3. C=
  4. D= ^2

Correct answer

B. >1, < 1

Step-by-step solution

The current gain parameters and characterize transistor amplification in different configurations. represents the common base current gain, defined as = I_C/I_E , where I_C is the collector current and I_E is the emitter current. Since I_E = I_B + I_C and I_B > 0 in active operation, I_C The relationship between and derives from I_E = I_B + I_C . Dividing by I_C yields 1/ = 1/ + 1 , leading to = /(1 - ) and = /(1 + ) . Given 1 , option B is correct. Final answer: B

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