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You are provided with iron filings and a bar magnet without labelling the poles of the magnet. Using this...
 
a. How will you identify the poles of the magnet?
 
A bar magnet when placed in a sheet spread with the filings towards its .
 
The  of a bar magnet that  most of the iron filings are called its .
 
b. Which part of the bar magnet attracts more iron filings? Why?
 
The attractive force of the magnet is high on its .
 
The magnetic force is  and  of a bar magnet. This applies not only to a bar magnet but also to .