Question

When iron filings are sprinkled on a sheet of glass placed over a short bar magnet then, the iron filings form a pattern suggesting that the magnet has ______.

Options

• random pole

• south pole similar to the negative charge

• two poles similar to the positive and negative charge of an electric dipole

• north pole similar to the positive charge

Answer 1

When iron filings are sprinkled on a sheet of glass placed over a short bar magnet then, the iron filings form a pattern suggesting that the magnet has two poles similar to the positive and negative charge of an electric dipole.

Explanation:

The north pole serves as the positive end, while the south pole serves as the negative end. In the presence of a magnetic field, the iron fillings get magnetized and create a small magnet, which is subsequently attracted to the poles of a bar magnet. The north pole of a bar magnet attracts the south pole of a small magnet and the other way around. As a result, all of the iron fillings are placed in a bar magnet's magnetic field lines.