(English Medium) ICSE Class 9 - CISCE Question Bank Solutions for Physics

Fill the blank spaces in the table given below:

There are two knitting needles. One of them is magnetized. How will you find out which one is magnetized, if no other magnet is available?

Describe two simple experiments to support the statement that magnetism is a property of the molecules of a magnet.

What do you understand by the term independent variable?

Describe, how you will proceed to determine the position of the pole of a bar magnet.

What do you understand by the term dependent variable?

Draw lines of force surrounding a bar magnet when it is placed in the magnetic meridian with its north pole pointing geographic, north.

Draw lines of force surrounding a bar magnet when it is placed in the magnetic meridian with its north pole pointing geographic south.

Bar magnets are often stored in pairs as shown in the figure. E and F being pieces of metal.

Name the metal used for E and F.

Bar magnets are often stored in pairs as shown in the figure. E and F being pieces of metal.

Why are E and F placed in contact with the poles of the magnets as shown in the diagram?

Bar magnets are often stored in pairs as shown in the figure. E and F being pieces of metal.

Mark on the diagram the poles of the second magnet,

Bar magnets are often stored in pairs as shown in the figure. E and F being pieces of metal.

What is the material of darkened part?

The figure shows a freely suspended magnet in the rest position. Copy the diagram and on its show:

1. Angle of declination
2. Angle in dip

Since every iron atom is a tiny magnet, why are not all iron bar magnets?

 If a magnet is carefully broken into two pieces as shown in figure (i), how does the magnetic strength of each piece compare with that of the original magnet? If another magnet is carefully broken in half along its long axis shown in figure (ii), how would the strength of each piece compare with that of the original magnet?

Draw the magnetic flux pattern near a bar magnet placed with its axis in the magnetic meridian and the south pole pointing towards geographic north.

Draw a clearly labelled diagram, to show how a steel bar is magnetised by a divided touch method. A written description is not required.

What do you understand by the term rest? Support your answer by giving two examples

What do you understand by the term motion? Support your answer by giving two examples

What are magnetic keepers? What are they used for?