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Electronics and Communication Engineering - Materials and Components

Exercise : Materials and Components - Section 5
41.

Assertion (A): In an intrinsic semiconductor J = (μn x μp)eni.

Reason (R): Intrinsic charge concentration ni at temperature T is given by ni2 = A0 T3 e-EG0/kT.

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:
No answer description is available. Let's discuss.
42.
When the atom of rare gas is placed in an electric field the nucleus shifts from the centre of electron cloud by an amount x. If the radius of electron cloud is R, then
x << R
x 0.5 R
x ≅ 0.75 R
x ≅ R
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
Macroscopic quantities of a given material
are absolutely constant
are a function of temperature
are a function of temperature, pressure field
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
For a superconductor, the relative permeability is
zero
high
low
either low or high
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
The relative permeability of a ferromagnetic material is
1
less than 1
about 10
1000 or more
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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