Identify the correct statements: (i) A compass is used to show the directions. (ii) The needle of a compass is magnetic. (iii) The needle of a compass always indicates the north and the south directions of the earth.
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.