| ⇦ | 
| ⇨ |
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: - The work of 146 kJ is performed in order to compress one kilo mole fo gas adiabatically
- In a discharge tube ionization of enclosed gas is produced due to collisions between
- In a n-p-n transistor about 10¹⁰ electrons enter the emitter in 2 μs,
- The focal lengths of a converging lens are fᵥ and fᵣ for violet and red lights
- Which one of the following equations of motion represents simple harmonic motion?
Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The work of 146 kJ is performed in order to compress one kilo mole fo gas adiabatically
- In a discharge tube ionization of enclosed gas is produced due to collisions between
- In a n-p-n transistor about 10¹⁰ electrons enter the emitter in 2 μs,
- The focal lengths of a converging lens are fᵥ and fᵣ for violet and red lights
- Which one of the following equations of motion represents simple harmonic motion?
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