EASY
12th Andhra Pradesh Board
IMPORTANT
Earn 100

Define magnetic inclination or angle of dip.

Important Questions on Magnetism and Matter

EASY
12th Andhra Pradesh Board
IMPORTANT
Classify the following materials with regard to magnetism: Manganese, cobalt, Nickel, Bismuth, Oxygen, Copper.
EASY
12th Andhra Pradesh Board
IMPORTANT
The force between two magnet poles separated by a distance d in the air is F. At what distance between them does the force become doubled?
EASY
12th Andhra Pradesh Board
IMPORTANT
State Gauss's law for magnetism.
EASY
12th Andhra Pradesh Board
IMPORTANT
In the Bohr atom model the electrons move around the nucleus in circular orbits. Obtain an expression the magnetic moment μ of the electron in a hydrogen atom in terms of its angular momentum L.
EASY
12th Andhra Pradesh Board
IMPORTANT

Answer the following question:

Magnetic field lines are always nearly normal to the surface of a ferromagnet at every point. (This fact is analogous to the static electric field lines being normal to the surface of a conductor at every point.) Why?

EASY
12th Andhra Pradesh Board
IMPORTANT

Answer the following question.

Would the maximum possible magnetization of a paramagnetic sample be of the same order of magnitude as the magnetization of a ferromagnet?

HARD
12th Andhra Pradesh Board
IMPORTANT

A compass needle free to turn in a horizontal plane is placed at the centre of circular coil of 30 turns and radius 12 cm. The coil is in a vertical plane making an angle of 45° with the magnetic meridian. When the current in the coil is 0·35 A, the needle points west to east. Determine the horizontal component of the Earth's magnetic field at the location.
Next, the current in the coil is reversed and the coil is rotated about its vertical axis by an angle of 90° in the anti clockwise sense looking from above. Predict the direction of the needle. Take the magnetic declination at the places to be zero.

MEDIUM
12th Andhra Pradesh Board
IMPORTANT
A Rowland ring of mean radius 15 cm has 3500 turns of wire wound on a ferromagnetic core of relative permeability 800. What is the magnetic field B in the core for a magnetising current of 1.2 A?