Question

what is a led?why it is used in place of a bulb in the tester​

Answer 1

Answer:

$꧁༒༈༺࿙αղsաҽɾ࿚༻༈༒꧂$

Explanation:

If the current through a circuit is too weak, the filament does not get heated sufficiently and it does not glow. 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.

Answer 2

it's means light emitting diodes it it uses Les energy so it is used in place of bulb in the tester