HSC Science (Electronics) 12th Board ExamMaharashtra State Board
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If the Frequency of Incident Light Falling on a Photosensitive Material is Doubled, Then the Kinetic Energy of the Emitted Photoelectron Will‘Be - HSC Science (Electronics) 12th Board Exam - Physics

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Question

If the frequency of incident light falling on a photosensitive material is doubled, then the kinetic energy of the emitted photoelectron will‘be........................................

  1. same as its initial value
  2. two times its initial value
  3. more than two times its initial value
  4. less than two times its initial value

Solution

(c) more than two times its initial value

Since the frequency is double, the value of E is also double.

K.E. = E - Φ

∴ K.E.1 = E - Φ                              ............(i)

   K.E.2 = 2E - Φ                             ..............(ii)

From (i) and (ii), we get

K.E.2 > K.E.1

  Is there an error in this question or solution?

APPEARS IN

 2014-2015 (March) (with solutions)
Question 5.3 | 1.00 mark

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Solution If the Frequency of Incident Light Falling on a Photosensitive Material is Doubled, Then the Kinetic Energy of the Emitted Photoelectron Will‘Be Concept: K.E.(Kinetic Energy) and P.E.(Potential Energy) in S.H.M..
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