Electronics and Communication Engineering - Analog Electronics

1. 

Negative feedback in amplifier

A. reduces gain
B. increases frequency and phase distortion
C. reduces bandwidth
D. increases noise

Answer: Option A

Explanation:

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2. 

Which of the following is the fastest switching device?

A. JFET
B. BJT
C. MOSFET
D. Triode

Answer: Option C

Explanation:

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3. 

Which of the following is not valid in case of bipolars?

A. It has a low input impedance
B. It has high voltage gain
C. It is a current controlled device
D. It is difficult to bias

Answer: Option D

Explanation:

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4. 

The input resistance of JFET ideally approaches

A. zero
B. 1 ohm
C. 100 ohm
D. infinity

Answer: Option D

Explanation:

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5. 

In the analysis of common emitter amplifier we may neglect

A. hre
B. hoe
C. hfe
D. hie

Answer: Option A

Explanation:

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