Question

Why is LED used in place of a bulb in a tester??​​

Answer 1

Answer:

LED (Light Emitting Diodes) can be used in place of the electric bulb in the tester, LED glows even when a weak electric current flows through it. s electric current produces magnetic current, a tester can be prepared by using a compass needle.

Answer 2

Answer:

It glows even when weak current passes through it.

Explanation:

LED is better than bulb to use in a tester as it glows even when a weak current passes through it.