| ⇦ | 
| ⇨ |
For photoelectric emission from certain metal the cut-off frequency is v. If radiation of frequency 2v impinges on the metal plate, the maximum possible velocity of the emitted electron will be (m is the electron mass)
Options
(a) √ hv / m
(b) √ 2hv / m
(c) 2 √hv / m
(d) √ hv / (2m)
Correct Answer:
√ 2hv / m
Explanation:
From photo-electric equation,
hv’ = hv + Kₘₐₓ …(i)
h.2v = hv + 1/2 mV²ₘₐₓ [ v’ = 2v ]
hv = 1/2 mV²ₘₐₓ ⇒ Vₘₐₓ = √ 2hv / m
Related Questions: - The wavelength of the short radio waves, microwaves, ultraviolet waves are λ₁,λ₂ and λ₃
- When a magnet is taken towards a coil, the induced e.m.f. depends on
- A carbon film resistor has colour code green, black, violet, gold. The value
- The wavelength of kα, X-rays produced by an X-ray tube 0.76Å. The atomic number
- A 1Ω resistance in series with an ammeter is balanced by 75 cm of potentiometer wire
Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The wavelength of the short radio waves, microwaves, ultraviolet waves are λ₁,λ₂ and λ₃
- When a magnet is taken towards a coil, the induced e.m.f. depends on
- A carbon film resistor has colour code green, black, violet, gold. The value
- The wavelength of kα, X-rays produced by an X-ray tube 0.76Å. The atomic number
- A 1Ω resistance in series with an ammeter is balanced by 75 cm of potentiometer wire
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