Question

Write the following statements are True or False

a. The magnetic strength of a conductor decreases with the increase in current.

b. A fuse wire breaks when the circuit is over loaded.

c. The strength of magnetic field produced by a coil depends on the number of

turns of the wire.

d. Magnetism of an electromagnet only lasts till the current is passed through it.​

Answer 1

Answer:

1. Why does a compass needle get deflected when brought near a bar magnet?

Ans. A compass needle is a small bar magnet with north and south pole. The compass needle deflects due to repulsion/attraction with the bar magnet.

2. Draw magnetic field lines around a bar magnet.

Ans.

3. List the properties of magnetic lines of force.

Ans. Properties of magnetic field lines of force:

(i) Magnetic field lines travel from N-pole of magnet towards 5-pole, outside the magnet and from S-pole to N-pole inside the magnet.

(ii) The strength of magnet/magnetic field is given by how close the field lines are if the field lines are closer magnet is stronger.

(iii) No two magnetic field lines ever intersect each other.