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Electronics and Communication Engineering - Materials and Components

Exercise : Materials and Components - Section 9
1.
The temperature at which some materials become superconductors is called
Transition temperature
Curie temperature
Neel temperature
Onnes temperature
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
In Fermi-Dirac statistics, the probability of electron occupation of an energy level equal to Fermi level is
0
0.25
0.5
1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
The quantum numbers associated with electron motion are designed as
a, b, c
h, k, l
n, m, l
h, n, l
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
The carrier mobility in a semiconductor is 0.4 m2/Vs. Its diffusion constant at 300 K will be (in m2/s)
0.40
0.16
0.04
0.01
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
Which of these has lowest dielectric strength?
Dry air
Wet air
Cotton
Paper
Answer: Option
Explanation:

Cotton and paper have higher dielectric strength than air. Moisture decreases dielectric strength.

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