MENU

For photoelectric emission from certain metal the cut-off frequency is v

For Photoelectric Emission From Certain Metal The Cutoff Frequency Is Physics Question

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:

  1. If a body travels half the distance with velocity v1 and the next half with velocity v2
  2. For principal quantum number n=3, the possible values of orbital quantum number
  3. A body of mass 3 kg acted upon by a constant force is displaced by S meter
  4. The resistance of a wire is 5 ohm at 50° C and 6 ohm at 100° C. The resistance
  5. Characteristic X-rays are produced due to

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.

NEETLab Mobile App

Share this page with your friends

Be the first to comment

Leave a Reply

Your email address will not be published.


*