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Expansion and Contraction

In summers, e...

Question

In summers, electric wires sag a little as ___________ on heating.

A

non-metals expand

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B

metals expand

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C

non-metals contract

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D

metals contract

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Solution

The correct option is B
metals expand

Metals expand on heating and contracts on cooling. Hence, in summers, when electric wires get heated due to sun's rays, they expand and sag a little.

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