Magnetism questions | form two Physics

The following are good examples of magnetic materials

1. Copper and glass
2. Nickel and Cobalt
3. Cobalt and Glass
4. Copper and Nickel

(a) State the law of magnetism.
(b) For each of the following, sketch the resulting magnetic field and mark the position of the neutral point if any, when:
(i) Two N-poles are brought close to each other but not touching.
(ii) N-pole and S-pole are brought close to each other but not touching.

Suppose you wanted to make strong permanent magnets, which of the following materials would you select:
A. Cobalt and Iron
B. Copper and Cobalt
C. Copper and Nickel
D. Nickel and Cobalt

Three methods commonly used to magnetize magnetic materials are:_______

The direction along which a magnetic compass North Pole would tend to move if placed in a magnetic field is called the line of:
A. demagnetization
B. flux
C. magnetism
D. neutral point

In the diagram below

(i) A and ________ represent ____________
(ii) X is _________________________

Magnetic materials can be magnetized in three different methods namely
A. stroking, burning and electrical methods.
B. stroking, electrical and induction methods.
C. burning, induction and hammering methods.
D. hammering, burning and demagnetizing methods.

A point at which the resultant magnetic flux density is zero is called_______

Draw magnetic lines of force of a bar magnet showing its poles.

A suspended bar magnet comes to rest pointing approximately in the:
A. North-East direction.
B. North-South direction.
C. North-West direction.
D. Up-down direction.