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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 15
41.
CE saturation resistance of n-p-n transistor is
Answer: Option
Explanation:
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42.
In LED the radiation is in
visible region
infrared region
both (a) and (b)
neither (a) nor (b)
Answer: Option
Explanation:
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43.
The rate of change of excess carrier density is proportional to carrier density.
True
False
Answer: Option
Explanation:
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44.
Tuned voltage amplifiers are not used
radio receivers
public address system
T.V. Receivers
band of freq. selected and amplified
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
The main reason why Ni-Zn ferrites are used for audio and T.V. transformers is that
they have large saturation magnetization
they are easy to fabricate by rolling
they are totally free from pores and voids
they have a high electrical resistivity
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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