Question

4. Why do we prefer to use LEDs rather than bulbs in testers?
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Answer 1

LED highlights the fact that whether the voltage is present in the bulb or not. when the tester touches the By connecting the flying lead to an earth reference and checking the circuit at various places will lighten the LED and the fault could be detected through this

Answer 2

Answer:

Answer. LED highlights the fact that whether the voltage is present in the bulb or not. when the tester touches the By connecting the flying lead to an earth reference and checking the circuit at various places will lighten the LED and the fault could be detected through this.

Explanation:

Hope it helps