Polarization Vector

Q.

The unit of Polarization is?

1. $C/m^2$

2. $C/m^3$
3. $C-m^2$
4. $C/m$

Q. Dipole moment is a scalar quantity.

1. False
2. True

Q. Polar dielectrics are those type of dielectrics where the possibility of positive and negative molecules coinciding with each other is null or zero.

1. True
2. False

Q. Dipole moment of each molecule in non polar system is zero.

1. False
2. True

Q. Dielectric susceptibility is a proportionality constant that indicates the degree of polarization of a dielectric material in response to an applied electric field.

1. False
2. True

Q. All the molecules in a non polar dielectric are symmetric in nature.

1. True
2. False

Q. Polarisation vector cannot be calculated for non-homogeneous and non-isotropic dielectrics.

1. True
2. False

Q. Three identical capacitors with same plate area and same plate separation of 1mm are filled with dielectrics of dielectric constant $k_1,k_2$ and $k_3$ having dielectric breakdown of $E_1,E_{2}and{E}_3$ respectively are arranged as shown in figure.
Given :
$k_1=2,E_1=3\times {10}^{6}v/m$
$k_2=4,E_2=20\times {10}^{6}v/m$
$k_3=5,E_3=5\times {10}^{6}v/m$

Maximum value of $E_o$ is $n\times {10}^3$ Volts, then n is

Q. If the dielectric constant of a substance is $K=\frac{4}{3}$, then the electric susceptibility ${\Psi }_e$ is:

1. $\frac{3}{4}$
2. $3$
3. $\frac{1}{3}$
4. $\frac{4}{3}$

Q. A parallel plates capacitor is located horizontally such that one of the plates is submerged in a liquid while the other is above the liquid surface. When plates are charged the level of liquid

1. rises
2. falls
3. remains unchanged
4. may rise or fall depending on the amount of charge