dielectric

What is the process of producing electric dipoles inside the dielectric by an external electric field?

• Polarisation

• Dipole moment

• Susceptibility

• Magnetisation

How does ionic polarisation occur?

• Splitting of ions

• Passing magnetic field

• Displacement of cations and anions

• Never occurs

Polar molecules have permanent dipole moments even in the absence of an electric field.

• true

• false

According to you which of the following polarisations is very rapid?

• Electronic polarisation

• Ionic polarisation

• Orientiation polarisation

When does a dielectric become a conductor?

• At avalanche breakdown

• At high temperature

• At dielectric breakdown

• In the presence of magnetic field

How capacitance of a capacitor changes if a dielectric material is introduced between its plates

• increases

• decreases

• same

dielectric substances are

• conductors

• insulators

• semiconductors

• can be any one

net charge in the dielectric before and after polarization is

• negative

• positive

• same

• can be any thing

in vacuum electric susceptibility is

• less than 1

• greater than 1

• small but negative

• zero

dimensions of displacement vector in SI units are

• C-m

• C/m

• C/m^2

• Cm^-2