Electronics and Communication Engineering - Electronic Devices and Circuits

1. 

One electron volt is equivalent to

A. 1.6 x 10-10 joule
B. 1.6 x 10-13 joule
C. 1.6 x 10-16 joule
D. 1.6 x 10-19 joule

Answer: Option D

Explanation:

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2. 

Resistivity of electrical conductors is most affected by

A. Pressure
B. temperature
C. composition
D. ageing

Answer: Option B

Explanation:

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3. 

Wiedemann-Franz law correlates

A. electrical and thermal conductivities
B. electron arrangement in shells
C. temperature and photo electric emission
D. all of the above

Answer: Option A

Explanation:

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4. 

In bipolar transistors dc current gain is

A.
B.
C.
D.

Answer: Option B

Explanation:

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5. 

Holes and electrons move in opposite directions.

A. True
B. False

Answer: Option A

Explanation:

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