A copper ball of radius 1 cm and work function 4.47 eV is irradiated with ultraviolet radiation of wavelength 2500 $$\text{Å}$$. 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 :

A

$$5.5 \times 10^{-13}$$ C

B

$$7.5 \times 10^{-13}$$ C

C

$$4.5 \times 10^{-12}$$ C

D

$$2.5 \times 10^{-11}$$ C