Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2018PhysicsSemiconductorsActual

Assertion : In a common emitter amplifier, the load resistance of the output circuit is 1000 times the resistance of the input circuit. If = 0.98 , then voltage gain is 49 10^3 . Reason : = 1- (Symbols have their usual meaning).

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

C. If assertion is true but reason is false.

Step-by-step solution

Here, R_o R_i =1000, =0.98 = 1- = 0.98 1-0.98 =49 Voltage gain = R_o R_i =49 1000=49 10^3

Practice Semiconductors on Quantrex Academy →

More from Semiconductors

For two inputs A and B and output Y, the Boolean expression for NOR gate is 2026For an n-type semiconductor, the relation between the number density ' n_h ' and ' n_e ' is 2026A silicon crystal is doped with 5 10¹⁷ cm ⁻³ atoms of boron. The electron concentration (n_e) at room temperature is (n_i = 1.5 10¹⁰ cm ⁻³) 2026If the current gain in common-base configuration ( ) of a transistor increases from 0.95 to 0.96, the percentage change in current gain in common-emitter configuration ( ) is appro 2026Out of the following what is used to detect the intensity of light ? 2026The color of light emitted by an LED is determined primarily by which of the following factors? 2026Which of the following is true for a p-type semiconductor? 2026In case of semiconductors, the band gap between the valence band and conduction band is 2026 Full Semiconductors list All NEET PYQs