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12th ICSE
IMPORTANT
Earn 100

Calculate the momentum of a photon of green light of λ=500 nm in SI unit.(h=6.63×10-34Js)

Important Questions on Photoelectric Effect

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12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 12
The energy of a photon is 42 eV. Find out the momentum of the photon.
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12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 13
The energy of a photon is 10 eV. Calculate momentum of the photon.
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12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 13
The energy of a photon is 10 eV.Calculate wavelength of the photon.
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12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 13
The energy of a photon is 10 eV. Calculate rest mass and dynamic-mass of the photon.
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12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 14
A photon ejects an electron of negligible kinetic energy from a metal surface. If the threshold frequency for the surface be 4.6×1014 Hz, Calculate the energy of the incident photon in electron-volt.
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12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 15
A metal sheet has a negative charge of 11.2 nC1 nC=10-9 C. How many photons of ultraviolet light are required to completely discharge the sheet by photoelectron ejection? What minimum amount of energy must be absorbed by the sheet to effect this discharge? The threshold frequency of the metal is 4.5×1015 Hz.
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12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 16
Assuming the visible region of the spectrum to be from 4000 Ao to 7500 Ao, calculate the maximum work function in electron-volt of a photo-cathode that can emit electrons with visible light of any wavelength.
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12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 17
The work function for sodium is 2.28 eV. What is the minimum energy for a quantum of radiation to cause photoelectric emission from a sodium surface?