MEDIUM
12th Odisha Board
IMPORTANT
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What is the function of base region of a transistor? Why this region is made thin and lightly doped?

Important Questions on Transistors

MEDIUM
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 20 - Transistors>MODEL QUESTIONS>Q 15

In the given circuit Fig. (A) a voltmeter V is connected across the lamp L. What changes would occur at lamp L and voltmeter V if the resistance R is reduced in value? Give reasons for your answer.

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HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 20 - Transistors>MODEL QUESTIONS>Q 16

In only one of the circuits given below the lamp L lights. Which circuit is it? Give reasons for your answer.

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HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 20 - Transistors>MODEL QUESTIONS>Q 1
For a transistor in CE mode, β = 50 and voltage drop across 1 KΩ which is connected in the collector circuit is 2 volt. Find the base current.
MEDIUM
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 20 - Transistors>MODEL QUESTIONS>Q 2
A transistor is connected in CE mode in which collector supply is 9 V and the voltage drop across load resistance RL connected in the collector circuit is 1.0 V. If RL =1 KΩ and α=0.99, determine (a) collector emitter voltage.
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 20 - Transistors>MODEL QUESTIONS>Q 2
A transistor is connected in CE mode in which collector supply is 9 V and the voltage drop across load resistance RL connected in the collector circuit is 1.0 V. If RL =1 KΩ and α=0.99, determine(b) base current.
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 20 - Transistors>MODEL QUESTIONS>Q 3
In a transistor amplifier, the collector load resistance RL is 2 KΩ and input resistance Ri is 1 KΩ . If the current gain is 50, calculate voltage gain of the amplifier.
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 20 - Transistors>MODEL QUESTIONS>Q 4
In a common base circuit, a resistance of 1 KΩ is connected in the collector base section. The voltage drop across it is 1.2 V. Find the base current if α=0.96.
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 20 - Transistors>MODEL QUESTIONS>Q 5
A transistor with its emitter grounded has α=0.95. If the base current changes by 1 mA, calculate change in collector current.