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NEET2012PhysicsSemiconductorsActual

In a CE transistor amplifier, the audio signal voltage across the collector resistance of 2 k is 2 ~V . If the base resistance is 1 k and the current amplification of the transistor is 100 , the input signal voltage is

Options

  1. A0.1 ~V
  2. B1.0 ~V
  3. C1 mV
  4. D10 mV

Correct answer

D. 10 mV

Step-by-step solution

Current amplification factor = I_C I_B Collector resistance I_C= 2 ~V 2 10^3 =1 10⁻³ ~A Base current I_B= V_B R_B = V_B 1 10^3 =V_B 10⁻³ Given, =100 Now, 100= 10⁻³ V_B 10⁻³ V_B= 1 100 ~V =10 mV

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