Q. A photosensitive metallic surface has work function $\phi$.If photon of energy $3\phi$ fall on this surface, the electron comes out with a maximum velocity of $6 \times 10^{6}$ m/s. when the photon energy is increased to $9\phi$, then maximum velocity of photoelectron will be
A) $12 \times 10^{6}$ m/s
B) $6 \times 10^{6}$ m/s
C) $3 \times 10^{6}$ m/s
D) $24 \times 10^{6}$ m/s
Explanation
The correct answer is Option B: $6 \times 10^{6}$ m/s.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.