Why is LED used in place of a bulb in a tester??
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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:
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.