Question

You are given a bar magnet whose N and S poles are not marked. Describe briefly how you would find out which end is the South Pole.

Answer 1

To find the north and south pole of the magnet we can use another clearly determined bar MAGNET

if we bring the north side of the magnet to the either one side of the old magnet and if you see the pole of the magnet attracting each other the the attracting side is the N pole of the magnet and opposite is the south pole

Answer 2

Answer:

The magnet will align to North-South direction. The pole facing geographical north will be north pole of the magnet as the earth's magnetic south pole is geographical north pole and the side of your magnet facing towards south will be the south pole of your magnet.

Explanation:

The North pole is where field lines come out and the South Pole is where they go into the magnet.  Unless they came marked with “N” or “S,” the poles of a magnet look the same. One easy way to tell which pole is north and which is south is to set your magnet near a compass. The needle on the compass that normally points toward the north pole of the Earth will move toward the magnet's south pole.

hope its helpful