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Why is led used in place of a bulb in tester

Posted by Atul Chudawdiya 7 years, 11 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 7 years, 10 months ago

These are light emitting diodes that contain two wires called LED. We use a LED in place of electric bulb. LED glows even when a small electric current flows through it. There are two wires (called leads) attached to LED. One lead is slightly longer than the other one. Remember that while connecting a circuit the longer lead of LED is always connected to the positive terminal of the battery and the shorter lead is connected to the negative terminal of battery.

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Posted by Lavanya Ayyagari 3 months ago

CBSE > Class 08 > Science