Exercise: Materials And Components

Questions for: Materials And Components

The magnetic moment in units of Bohr magneton of a ferrous ion in any ferrite is
A:
zero
B:
2
C:
4
D:
6
Answer: C
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Which of the following is the poorest conductor of electricity?
A:
Aluminium
B:
Nichrome
C:
Copper
D:
All of the above
Answer: B
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A material which is lightly repelled by a magnetic field is known as
A:
diamagnetic material
B:
non-magnetic material
C:
ferromagnetic material
D:
paramagnetic material
Answer: A
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A 200 turn coil has a self inductance of 10 mH. If the number of turns is doubled, all other quantities remaining the same, the self inductance will be
A:
2.5 mH
B:
5 mH
C:
20 mH
D:
40 mH
Answer: D

Inductance is proportional to square of number of turns.

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The classes of solid dielectrics are
A:
A, B, C, D, E, F, H
B:
A E B F H C D
C:
Y A E B F H C
D:
A E B F H C
Answer: C
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