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A copper ball of radius 1 ~cm and work function 4.47 ~eV is irradiated with ultraviolet radiation of wavelength 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 ~C
  2. B7.5 10⁻¹³ ~C
  3. C4.5 10⁻¹² ~C
  4. D2.5 10⁻¹¹ ~C

Correct answer

A. 5.5 10⁻¹³ ~C

Step-by-step solution

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