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Class 12 Physics Practice Test: Photoelectric Effect
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Class 12 Physics Practice Test: Photoelectric Effect
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10 Questions

1. Which radiations will be most effective for the emission of electrons from a metallic surface?
2. Which photon is more energetic: A red one or a violet one?
3. What is the frequency of a photon whose energy is 66.3 eV?
4. Why are alkali metals most suited as photo-sensitive metals?
5. Give the unit of work function.
6. If the wavelength of electromagnetic radiation is doubled, what will happen to the energy of photons?
7. What happens to the wavelength of a photon after it collides with an electron?
8. Calculate the energy of a photon of wavelength 6600 angstroms.
9. Photoelectric emission is possible at all frequencies.
10. Two metals A and B have work functions 4 eV and 10 eV respectively. Which metal has a higher threshold wavelength?

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