| ⇦ | 
| ⇨ |
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 current flowing through a lamp marked as 50 W and 250 V is
- A uniform chain of length L and mass m is kept on a smooth table. It is released
- A wheel of mass 10 kg has a moment of inertia of 10 kgm² about its own axis
- A pan is suspended from a steel wire. Weights are slowly put on the pan
- A thin ring of radius R meter has charge q coulomb uniformly spread on it
Topics: Electronic Devices
(124)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The current flowing through a lamp marked as 50 W and 250 V is
- A uniform chain of length L and mass m is kept on a smooth table. It is released
- A wheel of mass 10 kg has a moment of inertia of 10 kgm² about its own axis
- A pan is suspended from a steel wire. Weights are slowly put on the pan
- A thin ring of radius R meter has charge q coulomb uniformly spread on it
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