Repulsion is a true test for magnetism. Give a reason for the statement.
Give reasons.
(a) A magnetic needle comes to rest in the north-south position.
(b) A magnetic needle is used in a mariner’s compass.
(c) If a bar magnet is suspended vertically it does not hang in the north-south direction.
(d) Repulsion rather than attraction is the test for identifying a magnet.
Repulsion is the true test for magnetism.
Give a reason for the following;
Explain the statement: "Repulsion is the sure test of a permanent magnet" .