How can you magnetise a piece of magnetic material?

What is meant by the term "magnetic field lines"? List two properties of magnetic field lines.

$A$ uniform magnetic field is directed vertically upwards. In which direction should an $\alpha$-particle (which is a positively charged particle) be projected in this field so that it is deflected southwards? Name and state the rule used to find the direction in this case.

Write any one method to induce current in a coil.

$A$ coil made of insulated copper wire is connected to a galvanometer. What will happen to the deflection of the galvanometer if this coil is moved towards a stationary bar magnet and then moved away from it? Give reason for your answer and name the phenomenon involved.

Describe an activity with a neat diagram to show the magnetic field lines around a bar magnet.