Question

in the \before\ image, two bar magnets are positioned so their north poles are side - by - side. in the \after\ image, one of the magnets has been rotated. how will this affect the magnetic forces between them?
a the forces get weaker
b the forces do not change
c the forces repel instead of attract
d the forces attract instead of repel

Explanation:

In the "Before" image, the two bar magnets have opposite poles (N and S) adjacent? Wait, no—wait, the first magnet is S-N, the second is N-S, so the adjacent poles are N (from first) and N (from second)? Wait, no, looking at the "Before" diagram: first magnet is S (blue) - N (red), second magnet is N (red) - S (blue). So the adjacent poles are N (of first) and N (of second)? Wait, no, the first magnet's right end is N, the second's left end is N. So they are like poles (N-N) adjacent, which repel. In the "After" image, the second magnet is rotated to S (blue) - N (red), so now the first magnet's right end is N, the second's left end is S. Opposite poles (N and S) attract. So the force changes from repelling to attracting. So the correct option is D.

Answer:

D. The forces attract instead of repel