Question

7 A carpenter by chance mixed iron nails and screw with wood shaving. How can you
het him in getting back the nails and screws from the wood shings?
How will you find out the north and south poles of a barmagnet with no marking to
indicate poles?​

Answer 1

Answer:

By using a magnet, the carpenter can get his nails and screws back from the wooden shavings. By magnet both screws and iron nails will come out .

Answer 2

Explanation:

1.By using a magnet, the carpenter can get his nails and screws back from the wooden shavings. By magnet both screws and iron nails will come out .

2.A freely suspended bar magnet always comes to rest in the North-South direction. The geographical North facing end of the magnet is its north pole and the geographical south facing end is its South pole. Hence, the unknown poles of a bar magnet can be marked by suspending it freely by a string.