Exercise: Materials And Components

Questions for: Materials And Components

The units for ∈r are
A:
Farads
B:
Farads/m
C:
D:
no units
Answer: D

∈r is only a numeric. Hence no units.

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Assertion (A): Intrinsic resistivity of silicon is lower than that of germanium.

Reason (R): Magnitude of free electron concentration in germanium is more than that of silicon.

A:
Both A and R are true and R is correct explanation of A
B:
Both A and R are true but R is not correct explanation of A
C:
A is true but R is false
D:
A is false but R is true
Answer: D
No answer description is available. Let's discuss.
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The orientation polarization of a polyatomic gas is inversely proportional to absolute temperature.
A:
True
B:
False
C:
D:
Answer: A
No answer description is available. Let's discuss.
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For small size high frequency coils, the most common core material is
A:
air
B:
ferrite
C:
powdered iron
D:
steel
Answer: A
No answer description is available. Let's discuss.
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In an hydrogen atom, an electron moves in the field of a proton. The stability of orbit requires equilibrium between coulomb's force and centrifugal force.
A:
True
B:
False
C:
D:
Answer: A

Orbit is stable only if the two forces are equal and opposite.

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