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Electronics and Communication Engineering - Materials and Components

Exercise : Materials and Components - Section 4
26.
If there are no permanent dipoles in a dielectric material, the dielectric constant is independent of temperature.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.

Assertion (A): Magnetic susceptibility of copper is -0.5 x 10-5.

Reason (R): Copper is diamagnetic material.

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:

If magnetic susceptibility is very low μ, is nearly equal to 1 and the material is diamagnetic.

28.
An electron shell corresponding to principal quantum number n can contain a maximum of
n2 electrons
2n2 electrons
2n electron
n3 electron
Answer: Option
Explanation:

The electron shell corresponding to the principal quantum number can contain no more than 2n2 electrons.

29.
A sheet of bakelite is inserted between the plates of an air capacitor. The capacitance will
increase
decrease
remain the same
may increase or decrease
Answer: Option
Explanation:

Bakelite has higher permittivity than air.

30.
The spin angular momentum along a given direction is either or .
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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