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Materials and Components

1.

The materials which become polarized on the application of mechanical stress are called piezoelectric

Answer: A

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Answer: C

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3.

In solid insulator materials having only one kind of atom, the types of polarization which exist are

Answer: A

In elemental dielectrics only electronic polarization exists.

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Answer: A

Capacitance is directly proportional to permittivity.

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5.

A characteristic property of crystal is its periodicity of structure.

Answer: A

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Answer: D

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7.

As per temperature limits, the number of categories of solid dielectrics are

Answer: A

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8.

In van der walls crystals, there exists a high degree of stability of the outer electron shell.

Answer: A

This is the reason for chemical inactivity in these crystals.

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Answer: A

For equilibrium nucleus is shifted in the direction of E by an amount which is proportional to E.

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10.

Assertion (A): A capacitor with imperfect dielectric can be represented by a capacitance in parallel with resistance.

Reason (R): For imperfect dielectrics, dielectric constant has real and imaginary parts.

Answer: A

Imaginary part of dielectric constant is responsible for dielectric losses.

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