Three identical bars are kept on a table. Two out of three bars are magnets. In one of the magnets the North-South poles are marked. How will you find out which of the other two bars is a magnet? Identify the poles of this magnet.

5

(a)

Describe the steps involved in the magnetising of an iron strip with the help of a magnet.

5

(a)

You are provided with two identical metal bars. Out of the two, one is a magnet. Suggest two ways to identify the magnet.

5

(a)

Given below is a figure which shows a magnetic compass. Briefly explain what will happen to the position of its needle if you bring a bar magnet near it. Also, draw a diagram to show the effect on the needle on bringing the bar magnet near it. Also, draw the diagram to show the effect when the other end of the bar magnet is brought near it.

5

(a)

A bar magnet is cut into two pieces A and B from the middle as shown in figure.

Will the two pieces act as individual magnets? Mark the poles of these two pieces. Suggest an activity to verify your answer.

5

(a)

Where are the poles of a bar magnet located? Suggest a method to locate them.

5

(a)

(i) Give two reasons by which magnets lose their magnetic properties.
(ii) What safety measures will you follow to store horseshoe magnet?
(ill) How is compass used to find out the directions ?

5

(a)

Three identical iron bars are kept on a table. Two out of three bars are magnets. In one of the magnets the North-South poles are marked. How will you find out which of the other two bars is a magnet? Identify the poles of this magnet

5

(a)

Suggest an activity to prepare a magnetic compass by using an iron needle and a bar magnet

5

(a)