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Electronics and Communication Engineering - Materials and Components

Exercise : Materials and Components - Section 3
11.
The resistivity of intrinsic semiconductors, at room temperature, is of the order of
1 Ω-m
1000 Ω-m
106 Ω-m
10-3 Ω-m
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.

Assertion (A): Ferromagnetic materials possess ferromagnetic properties only when temperature is less than paramagnetic curie temperature.

Reason (R): For a ferromagnetic material for T > θf.

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.
13.
In terms of classical representation of electrons
an atom is essentially empty
an atom is essentially full
an atom may be essentially empty or full depending on the material
an atom may be essentially empty or full depending on temperature
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
To produce magnetic flux, mmf is necessary.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
For a polyatomic gas, the equation relating dielectric constant ∈r with molecular properties is
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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