railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Electronic Mechanic Electronic Devices and Circuits LED Lights

एलईडी एक _________ जंक्शन डायोड है जो सक्रिय होने पर प्रकाश का उत्सर्जन करता है।

1

n-p-n

2

p-n

3

n-p

4

p-n-p

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