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.
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.
(a) The Earth and a magnetic needle, both have magnetic property. Similar to a magnetic needle, the Earth has two magnetic poles, North pole and South pole. When there is an interaction between the magnetic poles of the Earth and the magnetic needle, the North pole of the Earth attracts the South pole of the magnetic needle, and the South pole of the Earth attracts the North pole of the magnetic needle. Hence, the magnetic needle comes to rest in the North−South position.
(b) It is difficult for a mariner to find direction while travelling through the sea or ocean. The magnetic needle always stays in North−South direction. Hence, using the magnetic needle in the mariner’s compass helps them to find direction easily.
(c) If a bar magnet is suspended vertically, it does not hang in North−South direction because in this position the magnetic field of the Earth is perpendicular to the magnetic field of the bar magnet.
So, there is no attraction between the Earth and the bar magnet.
(d) A magnet attracts a magnet as well as magnetic substances whereas repulsion is produced only between magnets. Hence, repulsion rather than attraction is the test for identifying a magnet.
(a) The Earth and a magnetic needle, both have magnetic property. Similar to a magnetic needle, the Earth has two magnetic poles, North pole and South pole. When there is an interaction between the magnetic poles of the Earth and the magnetic needle, the North pole of the Earth attracts the South pole of the magnetic needle, and the South pole of the Earth attracts the North pole of the magnetic needle. Hence, the magnetic needle comes to rest in the North−South position.
(b) It is difficult for a mariner to find direction while travelling through the sea or ocean. The magnetic needle always stays in North−South direction. Hence, using the magnetic needle in the mariner’s compass helps them to find direction easily.
(c) If a bar magnet is suspended vertically, it does not hang in North−South direction because in this position the magnetic field of the Earth is perpendicular to the magnetic field of the bar magnet.
So, there is no attraction between the Earth and the bar magnet.
(d) A magnet attracts a magnet as well as magnetic substances whereas repulsion is produced only between magnets. Hence, repulsion rather than attraction is the test for identifying a magnet.
