Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
2.6k views
in Physics by (25.7k points)
closed by

Explain the I-V characteristic of a forward biased junction diode.

1 Answer

+1 vote
by (25.9k points)
selected by
 
Best answer

1. Figure given below shows the I-V characteristic of a forward biased diode. 

2. When connected in forward bias mode, initially, the current through diode is very low and then there is a sudden rise in the current. 

3. The point at which current rises sharply is shown as the ‘knee’ point on the I-V characteristic curve.

4. The corresponding voltage is called the knee voltage. It is about 0.7 V for silicon and 0.3 V for germanium. 

5. A diode effectively becomes a short circuit above this knee point and can conduct a very large current. 

6. To limit current flowing through the diode, resistors are used in series with the diode. 

7. If the current through a diode exceeds the specified value, the diode can heat up due to the Joule’s heating and this may result in its physical damage.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...