Conductors and Insulators , Dielectrics and Electric Polarization NEET Questions

Physics - Electrostatics

Conductors and Insulators , Dielectrics and Electric Polarization MCQ Questions


13.
Which of the following materials is an insulator?

NEET - 2017

A.
Silver
B.
Aluminum
C.
Rubber
D.
Copper
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ANSWER :
C. Rubber
14.
When a conductor is placed in an external electric field, the field inside the conductor:
A.
Increases
B.
Becomes zero
C.
Decreases
D.
Remains the same
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ANSWER :
B. Becomes zero
15.
Which of the following is true about dielectrics in an electric field?
A.
They generate heat
B.
They conduct electricity
C.
They get polarized
D.
They produce light
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ANSWER :
C. They get polarized
16.
Polarization of a dielectric means:

NEET - 2020

A.
Creation of free electrons
B.
Separation of bound charges
C.
Formation of a new conductor
D.
Generation of current
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ANSWER :
B. Separation of bound charges
17.
The phenomenon of electric polarization results in:
A.
Magnetic field generation
B.
Free electron flow
C.
Induced charges on dielectric surfaces
D.
Heating of material
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ANSWER :
C. Induced charges on dielectric surfaces
18.
The potential inside a conductor is:
A.
Zero
B.
Variable
C.
Constant
D.
Infinite
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ANSWER :
C. Constant