A npn transistor is connected in common emitter configuration in a given amplifier. A load resistance of 800 \Omega is connected in the collector circuit and the voltage drop across it is 0.8 V. If the current amplification factor is 0.96 and the input resistance of the circuit is 192\Omega, the voltage gain and the power gain of the amplifier will respectively be:

  • Option 1)

    4, 3.84

  • Option 2)

    3.69, 3.84

  • Option 3)

    4, 4

  • Option 4)

    4, 3.69

 

Answers (1)

As we learnt in

Transistor -

Three layered semiconducting device .

NPN or PNP

- wherein

1.    Emitter is heavily doped

2.    collector is moderately doped .

3.    Base is lightly doped & very thin

 

 R_{L}=800 \Omega

V_{L}=0.8 V

Current amplification = 0.96

R_{i}=192\Omega

Voltage gain  =\frac{V_{0}}{V_{i}}=\beta.\frac{R_{L}}{R_{i}}

    =0.96 \times \left(\frac{800}{192} \right )=4

Power gain  =\beta^{2}\left(\frac{R_{L}}{R_{i}} \right )

       =0.96\times 0.96 \times\frac{800}{192}

        =0.96 \times \frac{96 \times 8}{192}=3.84

 


Option 1)

4, 3.84

Correct

Option 2)

3.69, 3.84

Incorrect

Option 3)

4, 4

Incorrect

Option 4)

4, 3.69

Incorrect

Most Viewed Questions

Preparation Products

Knockout NEET Aug 2021 (One Month)

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Weekend Live Classes, Mentorship from our Experts, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.

₹ 14000/- ₹ 4999/-
Buy Now
Knockout NEET Aug 2021

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Weekend Live Classes, Mentorship from our Experts, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.

₹ 22999/- ₹ 9999/-
Buy Now
Test Series NEET Aug 2021

Unlimited Chapter Wise Tests, Unlimited Subject Wise Tests, Unlimited Full Mock Tests, Get Personalized Performance Analysis Report,.

₹ 6999/- ₹ 2999/-
Buy Now
Rank Booster NEET 2021

Booster and Kadha Video Lectures, Unlimited Full Mock Test, Adaptive Time Table, 24x7 Doubt Chat Support,.

₹ 13999/- ₹ 6999/-
Buy Now
Knockout NEET May 2022

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Weekend Live Classes, Mentorship from our Experts, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.

₹ 34999/- ₹ 14999/-
Buy Now
Boost your Preparation for NEET 2021 with Personlized Coaching
 
Exams
Articles
Questions