Strengths of Magnets

Different magnets have different strengths.

How do you know which magnet is stronger?
Some magnets can pick up more objects than the others. These magnets are said to be stronger.
One way of measuring the strength of a magnet is by counting the number of paper clips that the magnet can attract and hold.

The magnet that holds the most number of paper clips is the strongest.

However, the strength of magnets do not always depend on their sizes. Some large magnets can be weak but some small magnets can be strong.

https://www.youtube.com/watch?v=BOxiOUIBtlg

How STRONG are magnets?? Take a look!

http://www.youtube.com/watch?v=0sfaacKAoYo