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Electronics and Communication Engineering - Materials and Components

Exercise : Materials and Components - Section 7
26.
Debye temperature of metals is
about 10 K
about 200 K
about 600 K
about 2 K
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
If Bmax is the maximum flux density, eddy current loss is proportional to
Bmax
B1.6max
B2max
B3max
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
As the viscosity of a liquid increases, the relaxation time
remains constant
increases
decreases
first decreases then increases
Answer: Option
Explanation:

Relaxation time increases with viscosity.

29.
A wire is carrying current I. The field intensity H at a distance r from the wire
is directed towards wire
is directed away from wire
is tangential every where to a circle of radius r
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
The materials which become polarized on the application of mechanical stress are called piezoelectric.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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