Question

select the true statements about magnetic interactions.
choose 2 answers:
a magnetic forces are always attractive.
b two objects can exert magnetic forces on each other without being in contact.
c permanent magnets are the only source of magnetic fields.
d all magnets have both a north and south pole.

Explanation:

• For option A: Magnetic forces can be attractive or repulsive (like poles repel, opposite poles attract), so A is false.
• For option B: Magnetic forces are non - contact forces, so two magnetic objects can exert forces on each other without touching, so B is true.
• For option C: Magnetic fields can also be produced by electric currents (e.g., electromagnets), so permanent magnets are not the only source, C is false.
• For option D: By the nature of magnets, every magnet has a north and a south pole (even if a magnet is broken, each piece still has a north and south pole), so D is true.

Answer:

B. Two objects can exert magnetic forces on each other without being in contact.
D. All magnets have both a north and south pole.