Dual Nature of Matter

JEE Main level, single correct, medium

185 of 200

Question 185 of 200

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 :

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

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