Question

Proof
Magnetic field at the axis of Bar magnet

Answer 1

Answer:

Explanation:

The strength of magnetic field around a bar magnet can be calculated. However the measurements at teo points are important at a point an the axis and at a point on the equatorial line of the bar magnet.these is called dead-on position and broadside -on position respectively

Answer 2

Answer:

You can use a plotting compass or iron filings to detect a magnetic field: put a piece of paper over a magnet (this stops the iron filings sticking to the magnet) sprinkle iron filings onto the paper. gently tap the paper to spread the filings out.

Explanation:

By convention, the field direction is taken to be outward from the North pole and in to the South pole of the magnet. ... A magnetic north pole will attract the south pole of another magnet, and repel a north pole. The magnetic field lines of a bar magnet can be traced out with the use of a compass.