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02-12-2016
Physics

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Which of the following is a poor electrical insulator?
A) Plastic
B) Glass
C) Wood
D) Wood
E) Sea Water

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02-12-2016

Sea water contains charged ions. These ions help in conduction of electricity. If you dip electrodes into salt water and connect them to voltmeter, you'll see deflection which implies salt water (sea water) is good conductor of electricity.

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