Question

(i) Why do the birds perch very high ?
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Answer 1

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When the bird perches on a single high power line, no current passes through its body because its body is at equipotential surface i.e., there is no potential difference. While when man touches the same line, standing bare foot on ground the electrical circuit is completed through the ground.

Answer 2

Explanation:

Why Birds Perch

Birds perch to rest, sleep, preen themselves and feed. Birds can sleep on twigs and power lines without falling off due to the powerful locking action of their flexor tendons. Perching in hard to reach places to sleep helps protect birds from predators while they are vulnerable.