Opto Electronics – 14

Opto Electronics » Exercise – 1

14. The colour of an LED can be changed by :

(a) Using different band gap semiconductors
(b) Varying the doping level of the semiconductor
(c) Increasing applied voltage
(d) None of the above

Answer
Answer : (b)

Explanation
Explanation : No answer description available for this question. Let us discuss.
Subject Name : Electronics Engineering
Exam Name : IIT GATE, UPSC ESE, RRB, SSC, DMRC, NMRC, BSNL, DRDO, ISRO, BARC, NIELIT
Posts Name : Assistant Engineer, Management Trainee, Junior Engineer, Technical Assistant
Electronics & Communication Engineering Books

Sale
Question Bank On Electronics & Communication Engineering
Book - question bank on electronics & communication engineering; Language: english; Binding: paperback
₹ 287
Sale
A Handbook for Electronics Engineering(Old Edition)
Made Easy Editorial Board (Author); Marathi (Publication Language); 620 Pages - 01/01/2015 (Publication Date) - Made Easy Publications (Publisher)
₹ 315
Basic Electronic Devices and Circuits
Patil (Author); English (Publication Language)
Electronic Circuits: Analysis and Design (SIE) | 3rd Edition
Neamen, Donald (Author); English (Publication Language); 1351 Pages - 08/25/2006 (Publication Date) - McGraw Hill Education (Publisher)
₹ 1,210

GATE 2023 Total InfoENGG DIPLOMAUGC NET Total Info
IES 2023 Total InfoPSUs 2022 Total InfoCSIR UGC NET Total Info
JAM 2023 Total InfoM TECH 2023 Total InfoRAILWAY 2022 Total Info

Related Posts

  • Opto Electronics - 22Opto Electronics » Exercise - 122. LED’s are fabricated from : (a) Si (b) Ge (c) Si or Ge (d) GaAs
    Tags: opto, electronics, exercise, led, engineering
  • Semiconductor Materials - 77Semiconductor Materials » Exercise - 277. In P-type semiconductor : (a) n=p (b) p (c) n (d) p>>n
    Tags: semiconductor, exercise, electronics, engineering
  • Semiconductor Materials - 93Semiconductor Materials » Exercise - 293. A semiconductor has generally ........ valence electrons. (a) 2 (b) 3 (c) 6 (d) 4
    Tags: semiconductor, exercise, electronics, engineering
  • Transistors - 95Transistors » Exercise - 2 95. If the value of α is 0.9, then value of β is ............ (a) 9 (b) 0.9 (c) 900 (d) 90
    Tags: exercise, electronics, engineering
  • Semiconductor Physics - 46555555555546. In general, LEDs operate at voltage levels from ________ V to ________ V. (a) 1.0, 3.0 (b) 1.7, 3.3 (c) 0.5, 4.0 (d) None of the above
    Tags: semiconductor, voltage, electronics, engineering

LEAVE A REPLY

Please enter your comment!
Please enter your name here