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JEE Main 201325 AprilOnline
Exam
JEE Main
Year
2013
Date
25 April
Mode
Online
Subject
Physics
Chapter
Dual Nature of Matter

JEE Main 2013 · 25 April · Online · Physics · Dual Nature of Matter

A copper ball of radius 1 ~cm and work function 4.47 ~eV is...

A copper ball of radius 1 cm1 \mathrm{~cm} and work function 4.47 eV4.47 \mathrm{~eV} is irradiated with ultraviolet radiation of wavelength 2500 A˚2500 ~Å. The effect of irradiation results in the emission of electrons from the ball. Further the ball will acquire charge and due to this there will be a finite value of the potential on the ball. The charge acquired by the ball is :

Options

  1. A5.5×10−13 C5.5 \times 10^{-13} \mathrm{~C}
  2. B7.5×10−13 C7.5 \times 10^{-13} \mathrm{~C}
  3. C4.5×10−12 C4.5 \times 10^{-12} \mathrm{~C}
  4. D2.5×10−11 C2.5 \times 10^{-11} \mathrm{~C}

Correct answer

A. 5.5×10−13 C5.5 \times 10^{-13} \mathrm{~C}

Step-by-step solution

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