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Physical Change

Electric wire...

Question

Electric wires in transformers droop down during summers. This is because metals ______ on heating.

A

contract

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B

expand

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C

rust

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D

remain same

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Solution

The correct option is B expand
Electric wires are made of metals like aluminium and copper. During summer, the temperature increases in the atmosphere which leads to expansion of such metals. This is the reason for sagging of electric wires during summer.

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