Electronics and Communication Engineering - Analog Electronics

1. 

When a transistor is to be at a temperature above 25°C

A. smaller heat sink be provided
B. maximum power rating be derated
C. biasing circuit must be strengthened
D. earth connections must be connected through a resistor

Answer: Option B

Explanation:

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2. 

Assertion (A): In monolithic IC the components are part of one chip

Reason (R): An op-amp is a high gain dc amplifier

A. Both A and R are correct and R is correct explanation for A
B. Both A and R are correct but R is not correct explanation for A
C. A is correct R is wrong
D. A is wrong R is correct

Answer: Option B

Explanation:

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3. 

The most widely used LC oscillator is

A. Hartley oscillator
B. Crystal oscillator
C. Colpitt's oscillator
D. Clapp's oscillator

Answer: Option A

Explanation:

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4. 

Which of the following statement is wrong?

A. A depletion type N-channel MOSFET conducts even when VGS = 0
B. A BJT is very sensitive to radiation whereas FET is relatively immune
C. Bipolars need higher supply voltage than FETs
D. Both N-channel as well as p-channel JFETs work in the depletion mode

Answer: Option C

Explanation:

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5. 

The disadvantage of FET over BJT is

A. poor high frequency performance
B. low power-handling ability
C. low values of voltage gain
D. all of the above

Answer: Option D

Explanation:

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