| ⇦ | 
| ⇨ |
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: - The breaking stress of a wire depends upon
- A particle of mass m, charge Q and kinetic enery T enters a transverse
- Magnetism of a magnet is due to
- Two bodies of masses m₁ and m₂ and having velocities v₁ and v₂ respectively
- Which dimensions will be the same as that of time?
Topics: Electronic Devices
(124)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The breaking stress of a wire depends upon
- A particle of mass m, charge Q and kinetic enery T enters a transverse
- Magnetism of a magnet is due to
- Two bodies of masses m₁ and m₂ and having velocities v₁ and v₂ respectively
- Which dimensions will be the same as that of time?
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