Electrical Engineering XYZ MCQs
If sag in overhead power line increases, tension in the line:
- Decrease
- Remains unaffected
- Increase
- None of these
Correct answer: 3. Increase
Explanation: When there is a sag in an overhead power line, it means that the line is not perfectly straight and has a downward curve due to its own weight and other environmental factors. As the sag increases, the distance between the line and the ground also increases.
The tension in an overhead power line is influenced by the sag in the line. When the sag increases, the tension in the line increases as well. This is because the increased sag results in a larger vertical component of the tension force, and the line has to support more of its own weight against gravity.
Therefore, if there is an increase in sag in an overhead power line, the tension in the line will also increase.