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Materials and Components

11.

Assertion (A): The angular momentum of an atom is due to three contributions viz. orbital, electron spin and nuclear spin.

Reason (R): The nuclear spin magnetic moment is much more than electron spin magnetic moment.

Answer: C

Nuclear spin is of the same order as electron sum.

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12.

Silicon and germanium have diamond structure. The number of atoms in a volume equal to a3 where a is the edge of elementary cube are

Answer: C

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13.

Spontaneous magnetisation is characteristic of ferromagnetic materials.

Answer: A

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14.

A dielectric material must be

Answer: A

Any material other than insulator will short-circuit the plates.

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15.

Above a certain temperature, the specific heat of a metal becomes constant. This temperature is called

Answer: A

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