Einstein’s Photoelectric Equation Numerical Class-12 Nootan ISC Physics Solution Ch-23 Photoelectric Effect. Step by step solutions of Kumar and Mittal Physics of Nageen Prakashan as council latest prescribe guideline for upcoming exam. Visit official Website CISCE for detail information about ISC Board Class-12 Physics.
Einstein’s Photoelectric Equation Numerical Class-12 Nootan ISC Physics Solution Ch-23 Photoelectric Effect
| Board | ISC |
| Class | 12 |
| Subject | Physics |
| Book | Nootan |
| Chapter-23 | Photoelectric Effect |
| Topics | Numericals on Einstein’s Photoelectric Equation |
| Academic Session | 2025-2026 |
Numericals on Einstein’s Photoelectric Equation
Class-12 Nootan ISC Physics Solution Ch-23 Photoelectric Effect.
Que-18: The work function of copper metal is 4 eV. Mono-chromatic light of wavelength 4000 Å falls upon it. Calculate the energy of the incident photon in joule. Also, express the work function in joule. Find out the kinetic energy of the fastest electron ejected from it.
Ans-
Que-19: Calculate the work function of sodium metal in electron-volt, if the photoelectric threshold wavelength is 5400 Å. Will photoelectrons be emitted, if red light of wavelength 6800 Å be incident on sodium?
Ans-
Que-20: An electromagnetic radiation of frequency 3 x 10^15 Hz falls on a photoelectric surface whose work function is 4.0 eV. Find out the maximum velocity of the photoelectrons emitted by the surface.
Ans- Suppose that the max velocity of photoelectron is Vmax then
Que-21: The maximum energy of photoelectrons is 10 × 10^-19 J when a surface is illuminated by light of wavelength 100 nm. What is the work function of the surface?
Ans- The work function
Que-22: Light of wavelength 500 nm is incident on a surface having a work function of 2.2 eV. Calculate the threshold frequency for this surface and the maximum velocity of emitted photoelectrons.
Ans- Threshold frequency
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