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Electronics and Communication Engineering - Materials and Components

Exercise : Materials and Components - Section 9
16.
The maximum temperature limit of class B insulation is
90°C
105°C
120°C
130°C
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Resistivity of metals consists of two parts, one part constant and the other temperature dependent.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
The number of valence electrons in germanium atom is
4
2
1
zero
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.

Assertion (A): ∈0 has the dimensions of farad per meter.

Reason (R): D = ∈0∈r E.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true but R is false
A is false but R is true
Answer: Option
Explanation:

The dimensions of ∈0 can be derived from the expression D = ∈0∈r E.

20.
When temperature is more than ferromagnetic curie temperature, the behaviour of a ferromagnetic material is similar to that of paramagnetic material.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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