Magnetism and Matter MCQ Questions and Answers for Practice

1. Which of the following property shows the property of ferromagnetic substances?

1. The ferromagnetic property depends on tem- perature.
2. The ferromagnetic property does not depend on temperature.
3. At high enough temperature ferromagnet becomes a diamagnet.
4. At low temperature ferromagnet becomes a paramagnet.

2. Which of the following is responsible for the earth's magnetic field?

1. Convective currents in earth's core
2. Diversive current in earth's core.
3. Rotational motion of earth.
4. Translational motion of earth.

3. Which of the following is not showing the essential difference between electrostatic shielding by a conducting shell and magnetostatic shielding?

1. Electrostatic field lines can end on charges and conductors have free charges.
2. Magnetic field lines can end but conductors cannot end them.
3. Lines of magentic field cannot end on any material and perfect shielding is not possible.
4. Shells of high permeability materials can be used to divert lines of magnetic field from the interior region.

4. Which of the following is correct about magnetic monopole?

1. Magnetic monopole exist.
2. Magnetic monopole does not exist.
3. Magnetic monopole have constant value of monopole momentum.
4. The monopole momentum increase due to increase at its distance from the field.

5. Which of the following independent quantities is not used to specify the earth's magnetic field?

1. Magnetic declination (θ).
2. Magnetic dip.
3. Horizontal component of earth's field (BH).
4. Vertical component of earth's field (BV).

6. Which of the following has higher magnetic susceptibility?zdiamagnetic

1. paramagnetic
2. ferromagnetic
3. None of these

7. Which of the following has a low value in ferrites?

1. Conductivity
2. Permeability
3. Magnetic susceptibility
4. All the above

8. What is the angle of dip at a place where the horizontal component of earth's magnetic field is equal to the vertical component?

1. 0^o
2. 30^o
3. 45^o
4. 90^o

9. Three needles N1 N2 and N3 are made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. A magnet, when brought close to them, will

1. attract N1 strongly, but repel N2 and N3 weakly.
2. attract all three of them.
3. attract N1 and N2 strongly but repel N3.
4. attract N1 strongly, N2 weakly and repel N3 weakly.

10. The vertical component of earth's magnetic field . at a place is sqrt(3) times the horizontal component the value of angle of dip at this place is

1. 30^o
2. 45^o
3. 60^o
4. 90^o

11. The strength of the earthcs magnetic field is

1. constant everywhere.
2. zero everywhere.
3. having very high value.
4. vary from place to place on the earth's surface.

12. The relation between geometric length (L) and magnetic length (L_m) is:

1. L_m = 56 L_g
2. L_m = 65 L_g
3. L_m = L_g
4. L_m = 2RY;UL L_g

13. The radius of curvature of the path of charged particle in a uniform magnetic file is directly proportional to the

1. charge on fie particle
2. Momentum of particle
3. energy of particle
4. Strength of field

14. The primary origin of magnetism lies in

1. atomic current and intrinsic spin of electrons.
2. polar and non polar nature of molecules.
3. pauli exclusion principle.
4. electronegative nature of materials.

15. The neutral point in the magnetic field of a horizontally placed bar magnet is a point where the magnetic field due to that bar magnet is:

1. zero
2. more than that of earth
3. less than that of earth
4. equal to that of earth