HARD
12th ICSE
IMPORTANT
Earn 100

Light of wavelength 5000 Ao from a 2 W bulb is falling on a surface. If the absorptive power of the surface be 60%, then how many photons are being absorbed by the surface per second? If 100 absorbed photons cause emission of 1 electron, then how much current will flow from the surface?

Important Questions on Photoelectric Effect

MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 10
What is the momentum of a photon from ultraviolet light of wavelength λ=332 nm? h=6.63×10-34 Js
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 11
Calculate the momentum of a photon of green light of λ=500 nm in SI unit.(h=6.63×10-34Js)
MEDIUM
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.
MEDIUM
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.
MEDIUM
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.
MEDIUM
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.
MEDIUM
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.
MEDIUM
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.