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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 11
46.
The Ni-Zn ferrites are used for audio and TV transformers is that
they have large saturation magnetisation
they are easy to fabricate by rolling
they are free from pores and voids
they have high electro-resistivity
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
Hall's effect can be used to measure
magnetic field intensity
average number of holes
carriers concentration
electrostatic field intensity
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
For insulators the energy gap is of the order of
0.1 eV
0.7 eV
1.1 eV to 1.2 eV
5 to 15 eV
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
When electronic emission occurs due to bombardment of high velocity electrons on a metal surface, it is called secondary emission.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
The reverse saturation current depends on the reverse bias.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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