Question

4.3.2 test (cst): electromagnets
question 14 of 20
which situation results in the least attraction between two magnets?
a. the south pole of one magnet is near the south pole of the other magnet.
b. the north pole of one magnet is near the south pole of the other magnet.
c. the north pole of one magnet is far away from the north pole of the other magnet.
d. the north pole of one magnet is far away from the south pole of the other magnet.

Explanation:

• Magnets have two poles: north (N) and south (S).
• Opposite poles (N - S or S - N) attract each other, while like poles (N - N or S - S) repel each other.
• In option A, two south poles (like poles) are near each other. Since like poles repel, there is no attraction.
• In option B, a north and a south pole (opposite poles) are near each other. Opposite poles attract, so there is attraction.
• In option C, two north poles (like poles) are far away. But if they were near, they would repel. However, the question is about attraction. Since they are like poles, there is no attraction. But the key is that in option A, the like poles are near (resulting in repulsion, which is the opposite of attraction), while in option C, the like poles are far. But the problem is about the least attraction. Since option A has repulsion (negative attraction in terms of the context of the question's "attraction" concept - as attraction is a positive force between opposite poles), and options C and D:
• In option D, a north and a south pole (opposite poles) are far. There is still a weak attraction (based on the property of opposite poles attracting, even at a distance, though weaker than when close).
• In option C, like poles (no attraction as per the pole - interaction rule). But when considering the question's context of "attraction" (opposite poles attract, like poles don't), option A has like poles near (so no attraction and actually repulsion, which is the least in terms of the "attraction" the question is asking about - as it's the only case with no attraction and a repulsive force instead of an attractive one).

Answer:

A. The south pole of one magnet is near the south pole of the other magnet.