Electronics and Communication Engineering - Materials and Components

6. 

The dielectrics having only one kind of atoms are known as elemental dielectrics.

A. True
B. False

Answer: Option A

Explanation:

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7. 

For a core having a relative permeability μr, magnetic dipole moment per unit volume M and field strength H, the flux density B is

A. B = μr (H + M)
B. B = μ0 (H + M)
C. B = μ0μr (H + M)
D. B = μ0μr (H - M)

Answer: Option B

Explanation:

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8. 

The law that (where K is thermal conductivity, σ is electrical conductivity and T is absolute temperature) for all metals is equal to a universal constant is known as

A. Lorentz law
B. Wiedemann Franz law
C. Curie Weiss law
D. Kittel law

Answer: Option A

Explanation:

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9. 

In elemental dielectrics, the orientation and ionic polarization are absent.

A. True
B. False

Answer: Option A

Explanation:

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10. 

In which of the following semiconductor are holes majority carriers

A. intrinsic
B. extrinsic
C. p type
D. n type

Answer: Option C

Explanation:

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