Test: Electrostatics Of Dielectrics


10 Questions MCQ Test Physics Class 12 | Test: Electrostatics Of Dielectrics


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This mock test of Test: Electrostatics Of Dielectrics for Class 12 helps you for every Class 12 entrance exam. This contains 10 Multiple Choice Questions for Class 12 Test: Electrostatics Of Dielectrics (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Electrostatics Of Dielectrics quiz give you a good mix of easy questions and tough questions. Class 12 students definitely take this Test: Electrostatics Of Dielectrics exercise for a better result in the exam. You can find other Test: Electrostatics Of Dielectrics extra questions, long questions & short questions for Class 12 on EduRev as well by searching above.
QUESTION: 1

1 microfarad is equal to​

Solution:

The microfarad (symbolized µF) is a unit of capacitance, equivalent to 0.000001 (10 to the -6th power) farad. The microfarad is a moderate unit of capacitance. In utility alternating-current (AC) and audio-frequency (AF) circuits, capacitors with values on the order of 1 µF or more are common.

QUESTION: 2

The polarized dielectric is equivalent to

Solution:

The polarization is defined by the dipole moment per unit volume, so the total dipole moment in the volume is: This is equivalent to two charges, each equal to , separated by distance .

QUESTION: 3

The dielectric Constant of a metal is

Solution:
QUESTION: 4

Which of the following statements is not true for polar molecules?

Solution:
QUESTION: 5

The extent of polarization depends on

Solution:

 The extent of polarization of dielectrics depends on the relative strength of two mutually opposite factors - the dipole potential energy tending to align the dipole with the external field and thermal energy tending to disrupt the alignment.

QUESTION: 6

A uniformly polarized dielectric amounts to induced ______ charge density but no ______charge density.

Solution:

As charges are separated on the surface of the dielectric but not in its interior volume.

QUESTION: 7

When a conductor is placed in an electric field; its free charge carriers adjust itself in order to oppose the electric field. This happen until

Solution:
QUESTION: 8

The dipole moment per unit volume is called

Solution:

The electric dipole moment per unit volume is called polarization or polarization density (vector p).

It is always directed from negative charge to positive charge.

If there are N atoms per unit volume than

vector p = N (vector p)

where p is the electric dipole moment of individual atom.

QUESTION: 9

The displacement of charges inside the dielectric stops when

Solution:
QUESTION: 10

The electric field inside a dielectric decreases, when it is placed in an external electric field. This happens due to

Solution:

The net electric field inside a dielectric decreases due to polarization. The external electric field polarizes the dielectric and an electric field is produced due to this polarization.

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