Electronics and Communication Engineering - Electronic Devices and Circuits

31. 

In a junction transistor biased for operation at emitter current 'IE' and collector current 'IC' the transconductance 'gm' is.

A.
B.
C.
D.

Answer: Option B

Explanation:

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32. 

Ferrities are particularly suited for high frequency applications because of their

A. low distortion
B. low eddy current loss
C. high conductivity
D. high mobility

Answer: Option B

Explanation:

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33. 

In intrinsic semiconductor, the fermi level

A. lies at the centre of forbidden energy gap
B. is near the conduction band
C. is near the valence band
D. may be anywhere in the forbidden energy gap

Answer: Option A

Explanation:

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34. 

Electromagnetic waves transport

A. energy only
B. momentum only
C. energy as well as momentum
D. neither energy nor momentum

Answer: Option C

Explanation:

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35. 

In a forward biased p-n junction current enters p material as hole current and leaves n material as electron current of the same magnitude.

A. True
B. False

Answer: Option A

Explanation:

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