JEE Main & Advanced
JEE Main Paper (Held On 25 April 2013)
question_answer
A copper ball of radius 1 cm and work function 4.47 eV us irradiated with ultraviolet radiation of wavelength \[2500{{\operatorname{A}}_{\circ }}\]. The effect of irradiation results in the emission of electrons form 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:
JEE Main Online Paper ( Held On 25 April 2013 )