Answer:
the charge the photoelectric effect induce is 0.132 × 10⁻¹¹ C
Explanation:
energy of ultraviolet light = [tex]\dfrac{hc}{\lambda}[/tex]
= [tex]\dfrac{6.626 \times 10^{-34}\times 3 \times 10^8}{251\times 10^{-9}}[/tex]
=7.91 × 10⁻¹⁹ J
=4.94 e V
energy released by the electron = 4.94 - 4.70
= 0.24 e V
potential at the surface of sphere =[tex]\dfrac{K Q}{r}[/tex]
0.24 = [tex]\dfrac{9\times 10^9\times Q}{0.0495}[/tex]
Q = 0.132 × 10⁻¹¹ C
hence, the charge the photoelectric effect induce is 0.132 × 10⁻¹¹ C
