How will a magnet help you to sort the materials given above into groups?

How will you test whether a given rod is a magnet or not?

How will you identify with the help of an experiment whether a given beam of light is of polarized light or of unpolarised light?

The intensity of magnetisation of a magnetic material is l . Now material is the cut such that volume of the material is halved, then new intensity of magnetization is

Define electrochemical series. How it helps to predict whether a given reaction is feasible in a given direction or not?

Magnetic keepers help to retain magnetism.

The following figure shows the variation of intensity of magnetisation I versus the applied magnetic field intensity H, for two magnetic materials A and B Which of the material have a larger susceptibility for a given field at constant temperature?

You are given leech, Nereis, Scolopendra, prawn and scorpion, and all have segmented body organisation. Will you classify them in one group? If no, give the important characters based on which you will separate these organisms into different groups.

How will you show that there is vacuum above the surface of mercury in a barometer ? What name is given to this vacuum ?

If M is magnetic moment developed in the material having volume V,then intensity of magnetisation is given by expession.

All metals are magnetic materials.