LED का अग्रगामी वोल्टेज कितना होता है?

This question was previously asked in
RRB ALP CBT 2 Electronic Mechanic Previous Paper: Held on 23 Jan 2019 Shift 1
View all RRB ALP Papers >
  1. 0.6 Vdc
  2. 1.5 Vdc से 3 Vdc
  3. 0.3 Vdc
  4. 1.8 Vdc से 3.3 Vdc

Answer (Detailed Solution Below)

Option 4 : 1.8 Vdc से 3.3 Vdc
Free
General Science for All Railway Exams Mock Test
2.1 Lakh Users
20 Questions 20 Marks 15 Mins

Detailed Solution

Download Solution PDF
  • एक प्रकाश-उत्सर्जक डायोड (LED) वह अर्धचालक प्रकाश स्रोत होता है जो इसके माध्यम से धारा के प्रवाहित होने पर प्रकाश उत्सर्जित करता है। 
  • एक LED का अग्रगामी वोल्टेज, VF , वह वोल्टेज है जिसे LED को चालू करने के लिए, एनोड से कैथोड तक, LED के लीड पर लागू किया जाना चाहिए।
  • आमतौर पर, एक LED का अग्रगामी वोल्टेज 1.8 और 3.3 वोल्ट के बीच होता है।
  • यह LED के रंग से भिन्न होता है।
  • एक लाल LED का आमतौर पर लगभग 1.7 से 2.0 वोल्ट तक पतन होता है।
  • चूंकि बैंड-अन्तराल के साथ वोल्टेज पात और लाइट आवृत्ति दोनों बढ़ती हैं।
  • एक नीली LED का लगभग 3 से 3.3 वोल्ट तक पतन होता है।

F2 Neha Madhu 29.10.20 D3

Latest RRB ALP Updates

Last updated on Jun 11, 2025

-> The RRB NTPC Admit Card 2025 has been released on 1st June 2025 on the official website.

-> The UPSC Prelims Result 2025 and UPSC IFS Result 2025 has been released @upsc.gov.in

-> Railway Recruitment Board activated the RRB ALP application form 2025 correction link, candidates can make the correction in the application form till 31st May 2025. 

-> The Railway Recruitment Board (RRB) has released the official RRB ALP Notification 2025 to fill 9,970 Assistant Loco Pilot posts.

-> The Railway Recruitment Board (RRB) has released the official RRB ALP Notification 2025 to fill 9,970 Assistant Loco Pilot posts.

-> The official RRB ALP Recruitment 2025 provides an overview of the vacancy, exam date, selection process, eligibility criteria and many more.

->The candidates must have passed 10th with ITI or Diploma to be eligible for this post. 

->The RRB Assistant Loco Pilot selection process comprises CBT I, CBT II, Computer Based Aptitude Test (CBAT), Document Verification, and Medical Examination.

-> This year, lakhs of aspiring candidates will take part in the recruitment process for this opportunity in Indian Railways. 

-> Serious aspirants should prepare for the exam with RRB ALP Previous Year Papers.

-> Attempt RRB ALP GK & Reasoning Free Mock Tests and RRB ALP Current Affairs Free Mock Tests here

More LED Questions

More Optical Sources and Detector Questions

Get Free Access Now
Hot Links: teen patti vungo teen patti club lotus teen patti teen patti gold real cash