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12th ICSE
IMPORTANT
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Explain the variation of photoelectric current in a photo-tube with voltage across the tube.

Important Questions on Photoelectric Effect

MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 3
Explain the variation of photoelectric current in a photo-tube with intensity of incident radiation, with graphs.
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 4
Explain the meaning of photoelectric work function of a metal. How does its value affect the kinetic energy of the liberated photoelectrons?
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12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 5
No photoelectrons can be liberated from a metal surface, if the wavelength of the incident light exceeds a certain value. Why?
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12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 6
With reference to photoelectric effect, define threshold wavelength.
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12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 7
How does the stopping potential depend upon the frequency and the intensity of the incident light? Explain by drawing graph.
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 8

In photoelectric effect what is meant by the terms: work function of a metal.

EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 8
In photoelectric effect what is meant by the terms: stopping potential?
HARD
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 10 - Photoelectric Effect>QUESTIONS>Q 9
The work function of aluminium is 4.2 eV. If two photons, each of energy 2.5 eV are incident on aluminium surface, will photoelectric emission occur?