Electronics and Communication Engineering - Electronic Devices and Circuits

31. 

The maximum power handling capacity of a resistor depends on

A. total surface area
B. resistance value
C. thermal capacity of the resistor
D. resistivity of the material used in the resistor

Answer: Option C

Explanation:

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32. 

Epitaxial growth is used in ICs

A. because it produces low parasitic capacitance
B. because it yields back to back isolating pn Junction
C. to grow single crystal n doped silicon on a single crystal P-type substrate
D. to grow Selectivity single crystal P doped silicon of one resistivity on a P type substrate of a different resistivity

Answer: Option D

Explanation:

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33. 

The mean life time of carrier may range from 10-9 seconds to hundreds of μ-seconds.

A. True
B. False

Answer: Option A

Explanation:

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34. 

In which mode of BJT operation are both junctions forward biased?

A. Active
B. Saturation
C. Cut off
D. Reverse active

Answer: Option B

Explanation:

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35. 

Addition of a small amount of antimony to germanium will result in

A. formation of P-type semiconductor
B. more free electrons than holes in the semiconductor
C. antimony concentrating on the edges of the crystals
D. increased resistance

Answer: Option B

Explanation:

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