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NEET 2010
Exam
NEET
Year
2010
Subject
Physics
Chapter
Dual Nature of Matter

NEET 2010 · Physics · Dual Nature of Matter

When monochromatic radiation of intensity I falls on a metal...

When monochromatic radiation of intensity II falls on a metal surface, the number of photoelectron and their maximum kinetic energy are NN and TT respectively. If the intensity of radiation is 2I, the number of emitted electrons and their maximum kinetic energy are respectively

Options

  1. AN\mathrm{N} and 2 T2 \mathrm{~T}
  2. B2 N2 \mathrm{~N} and T\mathrm{T}
  3. C2 N2 \mathrm{~N} and 2 T2 \mathrm{~T}
  4. DN\mathrm{N} and T\mathrm{T}

Correct answer

B. 2 N2 \mathrm{~N} and T\mathrm{T}

Step-by-step solution

(i) Kinetic energy of photoelectrons depends on the frequency of incident radiations and is independent of the intensity of illumination. (ii) Number of photoelectrons depends upon the intensity. So, the number of emitted electrons and their maximum kinetic energy are 2N2 N and TT respectively.
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