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A child staying in the coasted regions t...

A child staying in the coasted regions tests the drinking water and also the sea water with his tester. He finds that the compass needle deflects more in case of sea water. Can you explain the reasons?

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The impure water is conductor of electricity. Sea water contains more impurity (salt) than drinking water found in the coastal region. Therefore, sea water conducts more electricity than the drinking water. That is why, compass needle deflects more in case of sea water.
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