Embibe Experts Solutions for Chapter: Magnetism and Matter, Exercise 1: Exercise

Explain origin of paramagnetism on the basis of its atomic structure.

Two iron bars $\mathrm{A}$ and $\mathrm{B}$ are identical in appearance. One of these is definitely known to be magnetised (we do not know which one). How will you find whether the other one is magnetised or not? You are not to use anything other than the two bars.

 The charged currents in the outer conducting regions of the earth's core are thought to be responsible for the earth's magnetism. What might be the battery (source of energy) to sustain these currents?

Name the places on Earth where what is reason for earth's magnetism?

An iron bar magnet is heated to $1000°\mathrm{C}$ and then cooled in a magnetic field free space. Will it retain its magnetism?

How does the intensity of magnetisation of a paramagnetic material vary with increasing applied magnetic field? With increasing temperature?

Why is pure iron not used for making permanent magnets?

Define intensity of magnetisation of a magnetic material.