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HC Verma - Concepts of Physics Part 2

42. Photoelectric Effect and Wave-Particle Duality

23. Heat and Temperature
24. Kinetic Theory of Gases
25. Calorimetry
26. Laws of Thermodynamics
27. Specific Heat Capacities of Gases
28. Heat Transfer
29. Electric Field and Potential
30. Gauss’s Law
31. Capacitors
32. Electric Current in Conductors
33. Thermal and Chemical effects of Electric Current
34. Magnetic Field
35. Magnetic Field due to a Current
36. Permanent Magnets
37. Magnetic Properties of Matter
38. Electromagnetic Induction
39. Alternating Current
40. Electromagnetic Waves
41. Electric Current through Gases
42. Photoelectric Effect and Wave-Particle Duality
43. Bohr’s Model and Physics of the Atom
44. X-rays
45. Semiconductors and Semiconductor Devices
46. The Nucleus
47. The Special Theory of Relativity

Short Answer

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Objective I

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Objective II

Exercises

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Q. 30

In a photoelectri

Class 12th HC Verma - Concepts of Physics Part 2 42. Photoelectric Effect and Wave-Particle Duality

Answer :

Given, stopping potential =2V

Work function Ф =4.5eV

Wavelength λ=200nm

∴ From Einstein’s photoelectric equation

∴ Minimum kinetic energy of photoelectron is 1.7eV

And maximum kinetic energy

[∵ Electric potential of 2V is applied for the electrons to

accelerate ∴ it is (2+1.7)]

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