Chapter 22, Problem 85A

To determine

The reason that birds don’t get injured when they perch on high-voltage lines.

Answer to Problem 85A

Because in that way there is no potential difference across them due to which current does not pass through them.

Explanation of Solution

Introduction:

The current flows from high potential difference to low potential difference.

When the birds perch on a high-voltage line, then though they are in contact with high potential, they don’t get injured. This is because the birds are not in contact with Earth or any other low voltage device. Hence, no potential difference develops across them due to which no current flows through them.

Conclusion:

Hence, birds can sit on high voltage lines without being injured.