1. A photon emitted from the nucleus of an atom contains energy. The ratio of the photon energy to the frequency is
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2. Photons can exhibit wave and particle properties. In which of these experiments are these properties evident?
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3. In the photoelectric effect, light is incident on a clean metal plate and electrons are lost from the surface of the metal. The amount of energy required to liberate a single electron is equal to
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4. Which of the following graphs correctly shows the variation of kinetic energy of the emitted electrons with frequency of applied radiation? |
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5. A clean sodium metal is tested under a lamp, but no photoelectrons are emitted. To produce photoelectrons, what changes should take place?
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6. The electrons liberated from a clean metal surface produced by the photoelectric effect can be measured by a current flowing in an external circuit. What effect will there be on the current flowing and the stopping potential if the metal is replaced with one with a lower work function?
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7. The position and the momentum of a particle can never be both known precisely. This law is called
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8. A beam of electrons is directed at a thin slit as shown in the diagram.
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The minimum uncertainty in the momentum of an electron, Δp is
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9. For an electron in a circular orbit around a hydrogen nucleus (as given by the Bohr model of the atom), the angular momentum is given by
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10. The wavefunction of a particle is a function that gives the properties across space. The square of the amplitude of the wavefunction at a point is proportional to the
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