| ⇦ | 
| ⇨ |
A 5 watt source emits monochromatic light of wavelength 5000Å. When placed 0.5 m away, it liberates photoelectrons from a photosensitive metallic surface. When the source is moved to a distance of 1.. m, the number of photoelectrons liberated will be reduced by a factor of
Options
(a) 8
(b) 16
(c) 2
(d) 4
Correct Answer:
4
Explanation:
No. of emitted electrons Nₑ ∞ Intensity ∞ 1 / (distance)²
Therefore, as distance is doubled, Nₑ decreases by (1/4) times.
Related Questions: - Rutherford’s ∝ particle experiment showed that the atoms have
- The number of photo electrons emitted for light of a frequency v
- Two beams of light having intensities I and 4I interfere to produce a fringe pattern
- For a thermocouple, the neutral temperature is 270⁰C when its cold junction is at 20⁰C.
- Eddy currents are used in
Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Rutherford’s ∝ particle experiment showed that the atoms have
- The number of photo electrons emitted for light of a frequency v
- Two beams of light having intensities I and 4I interfere to produce a fringe pattern
- For a thermocouple, the neutral temperature is 270⁰C when its cold junction is at 20⁰C.
- Eddy currents are used in
Topics: Dual Nature of Matter and Radiation (150)
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