Which of the following is not a good conductor of electricity?

Wool

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Glass

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Diamond

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Iron

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Solution

The correct options are
A
Wool

B Glass
C
Diamond

Materials which allows electricity to pass through it are called good conductor of electricity. Iron is a good conductor of electricity because it has free moving electrons. Insulators do not allow electricity to pass through, as they have no free electrons in it. Wool, diamond and glass are examples of insulators.

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