magnetism and matter

What is the name of the phenomenon where a material becomes magnetized when placed in a magnetic field?

• Magnetic Attraction

• Magnetic Absorption

• Magnetic Repulsion

• Magnetic Induction

Consider the following statements: Statement – I: Magnetic field lines do not intersect each other. Statement _ II: If the magnetic field lines intersect, the magnetic field would not be unique at the point of intersection. With reference to the above statements:

• both statement - I and statement - II are true and statement - II is the correct explanation of the statement - I.

• both statement - I and statement - II are true and statement - II is not correct explanation of the statement - I.

• statement - I is true and statement - II is false

• both statement – I and statement – II are false

When the angle between the magnetic moment of a small compass needle and the uniform magnetic field in which it is placed is θ = 180°:

• the torque on the needle is maximum

• the needle is in stable equilibrium.

• the potential energy of the needle is zero

• the needle in unstable equilibrium.

When freely suspended, a magnet comes to rest in the direction:

• North- South

• East –West

• South – East

• South – West

If a magnetic substance is kept in a magnetic field, then which of the following substance moves out of the magnetic field?

• Diamagnetic substance

• Paramagnetic substance

• Ferromagnetic substance

• Both diamagnetic & paramagnetic substance

Which magnetic property is a strong effect?

• Paramagnetism

• Diamagnetism

• Ferromagnetism

• Both paramagnetism and ferromagnetism

The strength of the earth’s magnetic field is

• (a) constant everywhere.

• (b) zero everywhere.

• (c) having very high value.

• (d) vary from place to place on the earths surface.

The earth behaves as a magnet with magnetic field pointing approximately from the geographic

• (a) North to South

• (b) South to North

• (c) East to West

• (d) West to East

Point out the correct direction of magnetic field in the given figures.

• (a)

• (b)

• (c)

• (d)

If Mis magnetic moment and B is magnetic field intensity, then the torque is given by

• (a)

• (b)

• (c)

• (d)