Question

A bar magnet is cut in half, as shown.

A bar magnet oriented horizontally labeled N to the left and S to the right. A dotted line runs vertically down from above the magnet to below through the center of the magnet.

Which shows the pieces after the magnet is cut?

2 pieces of broken magnet with a jagged edge on the inside side of each piece. On the left a piece labeled N S from left and on the right a piece labeled N S from left.
2 pieces of broken magnet with a jagged edge on the inside side of each piece. On the left a piece labeled N S from left and on the right a piece labeled S N from left.
2 pieces of broken magnet with a jagged edge on the inside side of each piece. On the left a piece labeled N and on the right a piece labeled S.
2 pieces of broken magnet with a jagged edge on the inside side of each piece. On the left a piece labeled S and on the right a piece labeled N.

Answer 1

The first choice. Each half becomes a complete dipole with a north on its left end and a south on its right end (N ... S). Cutting a magnet produces two smaller magnets — you cannot isolate a single magnetic pole.