JEE Main & Advanced
Physics
Photo Electric Effect, X- Rays & Matter Waves
Question Bank
Numerical Value Type Questions - Photo Electric Effect, X-Rays
question_answer
A photoelectric current emerging in the circuit of a vacuum photocell when its zinc electrode is subjected to electromagnetic radiation of wavelength 262 nm is cancelled if an external decelerating voltage 1.5 V is applied. Find the magnitude of outer contact potential difference of the given photocell. Work function of zinc metal is 3.74 eV.