Free Printable MSA Quiz 1

1.

The unit of dipole moment/unit volume is

a)

$coulomb/metre$

b)

$coulomb/metre^2$

c)

$coulomb/metre^3$

d)

$coulomb$

2.

The flux density is related to the electric field as

a)

$D=\epsilon+E$

b)

$D=\epsilon-E$

c)

$D=\frac{\epsilon}{E}$

d)

$D=\epsilon E$

3.

The electronic polarisability $\alpha_e$ of a monoatomic gas is

a)

$4\pi\epsilon_o$

b)

$4\pi\epsilon_oR$

c)

$4\pi\epsilon_oR^3$

d)

$4\pi\epsilon_oR^2$

4.

The orientational polarizability per molecule in a polyatomic gas is given by

a)

$\frac{\mu_m}{3k_BT}$

b)

$\frac{\mu_m^2}{3k_BT}$

c)

$\frac{\mu_m^3}{3k_BT}$

d)

$\frac{\mu_m^2}{3k_BT^2}$

5.

For an elemental solid dielectric the total polarization is given by

a)

$\frac{N\alpha E}{1-\frac{\gamma N\alpha}{\epsilon_o}}$

b)

$\frac{N^2\alpha E}{1-\frac{\gamma N\alpha}{\epsilon_o}}$

c)

$\frac{N^2E}{1-\frac{\gamma N\alpha}{\epsilon_o}}$

d)

$\frac{N\alpha E^2}{1-\frac{\gamma N\alpha}{\epsilon_o}}$

6.

The polarization P in a solid dielectric is related to the electric field E and the electric flux density D by the relation

a)

$E=\epsilon_oD+P$

b)

$D=E+\epsilon_oP$

c)

$D=E\epsilon_o+P$

d)

$D=\epsilon_o\left(E+P\right)$

7.

For a given dielectric, as the temperature increases, the ionic polarizability

a)

Increases

b)

Decreases

c)

Remains Unaltered

d)

None of these

8.

The condition under which spontaneous polarization in a dielectric occurs is

a)

$\frac{N\alpha\beta^2}{\epsilon_o}=1$

b)

$\frac{N\alpha^2\beta^{ }}{\epsilon_o}=1$

c)

$\frac{N^2\alpha\beta^{ }}{\epsilon_o}=1$

d)

$\frac{N\alpha\beta^{ }}{\epsilon_o}=1$

9.

For a given dielectric, the electronic polarizability, $\alpha_e$

a)

Increases with temperature

b)

Decreases with temperature

c)

Is not affected by temperature change

d)

May increase or decrease with the temperature

10.

The piezoelectric effect is the production of electricity by

a)

Chemical Effect

b)

Varying filed

c)

Temperature

d)

Pressure

11.

The magnetic dipole moment is the product of the current in the loop and

a)

Flux enclosed by the current loop

b)

Square of the area enclosed by the current loop

c)

The area enclosed by the current loop

d)

It could be anything

12.

The relative permeability of a medium is the permeability relative to that of

a)

Water

b)

Vacuum

c)

Iron

d)

Coper

13.

Magnetic susceptibility $\chi$ is

a)

The dipole moment per unit volume

b)

The torque per unit area

c)

The magnetisation per unit magnetic field intensity

d)

The dipole moment per unit area

14.

The magnetic induction B and the magnetic field intensity H are related by

a)

$B=\mu_oH^2$

b)

$B=\mu_o^2H^{ }$

c)

$B=\mu_o\mu_rH^{ }$

d)

$B=\mu_o+H$

15.

1 Bhor magneton is

a)

$2.27\times10^{-24}A\ m^2$

b)

$6.67\times10^{-34}A\ m^2$

c)

$9.27\times10^{-24}A\ m^2$

d)

$9.27\times10^{-9}A\ m^2$

16.

The magnetisation of a solid is related to its magnetic induction B and the field strength H by the relation

a)

$M=\left(\frac{B}{\mu_o}\right)-H$

b)

$B=\mu_oH+M$

c)

$B=H+\mu_oM$

d)

$B=\mu_o\left(H-M\right)$

17.

The magnetic material in which permanent magnetic dipoles (due to electron spin) are already aligned due to bonding forces are known as

a)

Paramagnetic materials

b)

Ferromagnetic materials

c)

Ferrimagnetic materials

d)

Diamagnetic materials

18.

Diamagnetic material possess

a)

Permanent magnetic dipoles

b)

No permanent magnetic dipoles

c)

Induced dipole moment

d)

Can not define

19.

The susceptibility of a diamagnetic material is about

a)

$10^5$

b)

$10^7$

c)

$10^{-7}$

d)

$-10^{-5}$

20.

For a paramagnetic material, the energy difference between the spin magnetic dipole parallel and antiparallel to an external field H is

a)

$\mu_BH$

b)

$\frac{\mu_oH}{4\pi}$

c)

$2\mu_o\mu_BH$

d)

$\mu_o\mu_BH$

MSA Quiz 1

Total questions: 20

Worksheet time: 10mins

Similar Resources on Wayground