Question

A child staying in a coastal region uses his tester (consisting of a magnetic needle) with drinking water and sea water. He observes that

• A. magnetic needle deflects more in the case of sea water.
• B. magnetic needle deflects more in the case of drinking water
• C. magnetic needle does not deflect in any case.
• D. magnetic deflection will be same in both cases

Answer 1

The correct option is A

magnetic needle deflects more in the case of sea water.

Sea water is more conducting compared to drinking water, as the former has more salts. So, more current flows through sea water than through drinking water. Hence, when tested with a tester, the magnetic deflection will be more in the case of sea water.