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Applications of Transistors, Class 12 Physics NCERT Solutions

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1. There will be total 10 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying.

1. Which of the following is not an ac parameter of a transistor?

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Question 1 of 10

2. What is the voltage gain in a common emitter, where input resistance is 3Ω and the load resistance is 24Ω, β = 0.6

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Question 2 of 10

3. An oscillator is nothing but an amplifier with:

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Question 3 of 10

4. The output characteristic for a common emitter transistor is shown in the given figure.

1Use the graph to find out the current amplification factor for the transistor when VCE = 2 V.

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Question 4 of 10

5. The power amplification for a common emitter (CE) amplifier is 22110. Its current gain is 67 and internal resistance is 200 ohm. What is the value of the of the output resistance?

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Question 5 of 10

6. A common emitter (CE) amplifier has a current gain of 49. The voltage drop across the collector terminal is 1.8 V. The collector resistance is 2.2 kilo-ohm. What is the base current in the CE amplifier?

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Question 6 of 10

7. Which of the following relations correctly shows the value of current amplification factor at a constant collector-emitter voltage?
1

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Question 7 of 10

8. Transistors are useful in equipments such as hearing aids and small radio receivers because transistors :

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Question 8 of 10

9. The input voltage applied to a cascaded amplifier (consisting of two amplifiers) is 0.02 V and the output voltage is 6 V. The voltage gain of one of the two amplifiers is 10. What is the voltage gain of the other amplifier?

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Question 9 of 10

10. In a common base transistor circuit, the current gain is 0.98. On changing emitter current by 5 mA, the change in collector current is

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Question 10 of 10

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