Question

why is led used in place of a bulb in a tester​

Answer 1

■---■---■---■

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. So, electric current produces magnetic current, a tester can be prepared by using a compass needle.

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

Explanation:

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.