Question

The telephone wires which sog in summer become straight in winter. Give reason.

Answer 1

because due to much heat in summer it get

Answer 2

Answer:

As per the question,

 

Telephone wires During summer, the wires heat up and expand in length. Hence it sags down. During winter, the temperature drops and wires cool down. Due to a decrease in temperature, it contracts in length and hence becomes straight.

Most Telephone wires are one or more twisted pairs of copper wire, on which contraction is seen in winter and expansion in Summer.