Exercise: Materials And Components

Questions for: Materials And Components

In intrinsic semiconductors, the number of free electrons is equal to the number of mobile holes.
A:
True
B:
False
C:
D:
Answer: A
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In metals, the average drift velocity of electron per unit field is called mobility.
A:
True
B:
False
C:
D:
Answer: A
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The temperature below which certain materials are antiferromagnetic and above which they are paramagnetic is called
A:
Weiss temperature
B:
Curie temperature
C:
Neel temperature
D:
None of the above
Answer: C
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In crystalline solids, atoms are stacked in a regular manner.
A:
True
B:
False
C:
D:
Answer: A
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Which of the following are donor impurities?
  1. Gold
  2. Phosphorus
  3. Boron
  4. Antimony
  5. Arsenic
  6. Induim
Select the correct answer using the following codes
A:
1, 2, 3
B:
1, 2, 4, 6
C:
3, 4, 5, 6
D:
2, 4, 5
Answer: D

Donor impurities have five valence electrons.

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