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JEE Main 201226 MayOnline
Exam
JEE Main
Year
2012
Date
26 May
Mode
Online
Subject
Physics
Chapter
Dual Nature of Matter

JEE Main 2012 · 26 May · Online · Physics · Dual Nature of Matter

Photoelectrons are ejected from a metal when light of frequency v...

Photoelectrons are ejected from a metal when light of frequency vv falls on it. Pick out the wrong statement from the following.

Options

  1. ANo electrons are emitted if vv is less than W/hW / h, where WW is the work function of the metal
  2. BThe ejection of the photoelectrons is instantaneous.
  3. CThe maximum energy of the photoelectrons is hu.
  4. DThe maximum energy of the photoelectrons is independent of the intensity of the light.

Correct answer

C. The maximum energy of the photoelectrons is hu.

Step-by-step solution

According to photo-electric equation : K.Emax⁡=hv−hv0\mathrm{K} . \mathrm{E}_{\max }=\mathrm{h} v-\mathrm{h} v_0 (Work function) Some sort of energy is used in ejecting the photoelectrons.
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