| ⇦ | 
| ⇨ |
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: - Electrical force is acting between two charges kept in vacuum. A copper plate
- An unpolarised beam of intensity I₀ falls on a polaroid. The intensity
- If the velocity of an electron increases, then its de Broglie wavelength will
- If longitudinal strain for a wire is 0.03 and its poisson’s ratio is 0.5
- In nuclear fission, the percentage of mass converted into energy is about
Topics: Electronic Devices
(124)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Electrical force is acting between two charges kept in vacuum. A copper plate
- An unpolarised beam of intensity I₀ falls on a polaroid. The intensity
- If the velocity of an electron increases, then its de Broglie wavelength will
- If longitudinal strain for a wire is 0.03 and its poisson’s ratio is 0.5
- In nuclear fission, the percentage of mass converted into energy is about
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