Question

LEDs are used in most of the testers. why is it so?​

Answer 1

Answer:

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.

Explanation:

Hopefully it helps!

Answer 2

Explanation:

because LED is usful to us because

any electric thing test in this thing electreicity

available or no so: this reason this but

good Question