| ⇦ | 
| ⇨ |
A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV. It can be detect a signal of wavelength
Options
(a) 4000 nm
(b) 6000 nm
(c) 4000Å
(d) 6000Å
Correct Answer:
4000Å
Explanation:
λₘₐₓ = hc / E
= 6.6 x 10⁻³⁴ x 3 x 10⁸ / 2.5 x 1.6 x 10⁻¹⁹ = 5000Å
The wavelength detected by photodiode should be less than λₘₐₓ. Hence it can detect a signal of wavelength 4000Å.
Related Questions: - A current of 5 A is flowing at 220 V in the primary coil of a transformer. If the voltage
- Kirchoff’s I law and II laws of electricity prove respectively the
- In Young’s double silt experiment, 12 fringes are observed to be formed
- If r denotes the distance between sun and the earth, then the angular momentum of the earth
- A rod lies along the X-axis with one end at the origin and the other at x→∞. It carries
Topics: Electronic Devices
(124)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A current of 5 A is flowing at 220 V in the primary coil of a transformer. If the voltage
- Kirchoff’s I law and II laws of electricity prove respectively the
- In Young’s double silt experiment, 12 fringes are observed to be formed
- If r denotes the distance between sun and the earth, then the angular momentum of the earth
- A rod lies along the X-axis with one end at the origin and the other at x→∞. It carries
Topics: Electronic Devices (124)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply