State whether the following statements are true or false. Correct the false statements.

(a) Both the poles of the magnet exist in pairs.

(b) The strength of the magnetic field of a magnet increases as we move away from it.

(c) Magnetic lines of force may intersect one another.

(d) Magnetic induction is a temporary method of making magnets.

(e) The magnet remains unaffected even if handled roughly.

Which method of making magnets involves the use of two magnets?

1. Single touch method
2. Double touch method
3. Magnetic induction
4. Electrical method

Which of the following is made when electricity is passed through it?

1. Lodestone
2. Natural magnet
3. Permanent magnet
4. Electromagnet

Which is not a method of demagnetising a magnet?

1. Heating
2. Hammering
3. Suspending
4. Alternating current