Question

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 1

Sea water contains more electrolytes than other sources of water. Presence of electrolytes increases the electrical conductivity of water. Hence, compass needle deflects more in case of seawater when drinking water and sea water are tested for electrical conductivity.