Question

Telephone wires are intentionally kept slightly loose between the poles at the time of laying them.

• A. True
• B. False

Answer 1

The correct option is A True

1. Solids expand in all directions on heating.
2. A solid metallic wire has a linear expansion means its length changes with a change in temperature.
3. Telephone wires are intentionally kept slightly loose between the poles at the time of laying them
4. If it is not done so the telephone wire may get broken because of being continuous tight and loose in winter(due to fall in temperature) and summer(due to rise in temperature) respectively.

Hence, the given statement is true.