The statement below is followed by four options. Each option is related to the item in the statement, but only one is always true. Select the option that always holds and makes the statement true.
"A magnet always has ______."
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Two poles
The answer must hold for every magnet, without exception. An option that is present in most cases but can be missing in even one case is not always true.
Option (1) Two poles — every magnet, whatever its shape, has a north pole and a south pole; even a broken piece of a magnet has both, so this is always true.
Option (2) A horseshoe shape — magnets are also bar-shaped, ring-shaped, cylindrical or ball-shaped.
Option (3) Red paint on one end — paint is only a marking; many magnets are not painted at all.
Option (4) A battery attached — a bar magnet works without any battery; only an electromagnet needs a current.