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Q.

What are insulators?

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a

Materials which allow electric current to pass through them only under certain conditions.

b

Materials which can carry only a small amount of current through them.

c

Materials which do not allow electric current to pass through them.

d

Materials which allow electric current to pass through them.

answer is B.

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Detailed Solution

  • Materials that do not allow electric current to pass through them are called insulators.
  • For example, plastic, rubber, cotton, etc
  • They are bad conductors of electricity and hence are often used as a covering on electric wires to prevent electric shock.
     
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What are insulators?