2023 Exam Questions
Q. If the maximum kinetic energy of emitted electrons in photoelectric effect is 2e V, the stopping potential will be____.
(A) 0.5 V
(B) 1.0 V
(C) 1.5 V
(D) 2.0 V
Q. With neat labelled circuit diagram, describe an experiment to study the characteristics of photoelectric effect.
Q. An electron is accelerated through a potential difference of 100 volt. Calculate de-Broglie wavelength in nm.
2022 Exam Questions
Q. Is it always necessary to use red light to get photoelectric effect?
Q. How does the wave theory of light fail to explain the observations from experiment on photoelectric effect? [Give any two points]
Q. What is de-Broglie hypothesis? Obtain the relation for de-Broglie wavelength.
Q. Explain de Broglie wavelength. Obtain an expression for de Broglie wavelength of wave associated with material particles.
Q. The photoelectric work function for a metal is 4.2 eV. Find the threshold wavelength.
