Electronics and Communication Engineering - Materials and Components

1. 

In crystalline solids, atoms are stacked in a regular manner.

A. True
B. False

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

2. 

The temperature below which certain materials are antiferromagnetic and above which they are paramagnetic is called

A. Weiss temperature
B. Curie temperature
C. Neel temperature
D. None of the above

Answer: Option C

Explanation:

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3. 

In metals, the average drift velocity of electron per unit field is called mobility.

A. True
B. False

Answer: Option A

Explanation:

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4. 

Ferrites have

A. a low copper loss
B. low eddy current loss
C. low resistivity
D. higher specific gravity compared to iron

Answer: Option B

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.

A. True
B. False

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

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