Question

10.Electric wires sag a little during summers and appear tight during winters. Why?

Answer 1

Answer:

Explanation: As we know that metals expand in heat and shrink in cold temperatures. So, during summer the rising temperature makes the copper in the wire expand - so it gets sagged. but, during winter, the scenario is completely reverse and the copper contracts and so the wire becomes tight.

Explanation:

Answer 2

Answer:

Here is your answer

Explanation:

metals expand in heat and shrink in cold temperatures. So during summer the increasing temperature makes the copper in the wires expand(so it sags).but during the winter the decreasing temperature makes the copper in the wire contract which makes it tight.