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Electronics and Communication Engineering - Materials and Components

Exercise : Materials and Components - Section 2
1.
In crystalline solids, atoms are stacked in a regular manner.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
The temperature below which certain materials are antiferromagnetic and above which they are paramagnetic is called
Weiss temperature
Curie temperature
Neel temperature
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
In metals, the average drift velocity of electron per unit field is called mobility.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
Ferrites have
a low copper loss
low eddy current loss
low resistivity
higher specific gravity compared to iron
Answer: Option
Explanation:

Resistivity of ferrites is very high as compared to that of iron. Hence eddy curretns are much less.

5.
In intrinsic semiconductors, the number of free electrons is equal to the number of mobile holes.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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