GATE ECE · 2018 · EC
Question 30: P-N junction
Give it a try, then reveal the answer to check your work.
Question 30
ECMCQ2 marksNeeds review
Red (R), Green (G) and Blue (B) Light Emitting Diodes (LEDs) were fabricated using p-n junctions of three different inorganic semiconductors having different band-gaps. The built-in voltages of red, green and blue diodes are
,
and
, respectively. Assume donor and acceptor doping to be the same (
and
, respectively) in the p and n sides of all the three diodes.
Which one of the following relationships about the built-in voltages is TRUE?Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerEXPLORE & PRACTISE
Paper and topic context
See where this question comes from and choose what to practise next.
2018EC
GATE ECE 2018 · Paper 1
Electronics and Communication Engineering · Original paper archive
- Section
- Electronics and Communication Engineering
- Question type
- Multiple choice (MCQ)
- Marks
- 2 marks
Practise related topics
Explore more previous year questions using this question’s imported topic tags.
electronics
GATE ECE previous year questions
communication engineering
GATE ECE previous year questions
signals and systems
GATE ECE previous year questions
n junction
GATE ECE previous year questions
P N junction
GATE ECE previous year questions
Comments
Ask a question, share your approach, or help someone understand.
Log in to view the discussion
You’re not logged in. Log in or create an account to see discussions and add comments.