A child staying in a coastal region tests the drinking water and also the seawater with his tester. He finds that the compass needle deflects more in the case of seawater. Can you explain the reason?
Answer
Drinking water contains small amounts of salt dissolved in it but sea water contains a large amount of dissolved salts in it.
Since the sea water contains more salt, therefore it is a better conductor of electricity than drinking water.
Hence, the deflection of compass needle is much more in the case of sea water
