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Electronics and Communication Engineering - Materials and Components

Exercise : Materials and Components - Section 6
11.
The induced magnetic dipole moment has a direction opposite to the applied magnetic field.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
An atom of polarizability a is placed in a homogeneous electric field E. The energy stored in polarized atom is
aE2
a2E
aE2
aE
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
If B, H and M denote flux density, field intensity and magnetisation, B = μ0 (H + M).
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
A capacitor can be represented by a capacitance and resistance in parallel. For a good capacitor, this parallel resistance should be
negligible
low
high
very high
Answer: Option
Explanation:

The dielectric of a good capacitor should have very high resistivity.

15.

Assertion (A): Ionic solids, in general, have no electrical conductivity.

Reason (R): In ionic solids, electrons are tightly bound to the nucleus.

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 electrons are tightly bound, conductivity is not there.

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