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1. Kinematics 2. Dynamics 3. Oscillations and Waves 4. Fluid Mechanics 5. Molecular Physics 6. Electrostatics 7. Motion of charged particles in an electric field 8. Electric current 9. Constant magnetic field 10. Motion of charged particles in complex fields 11. Electromagnetic induction 12. Electromagnetic waves 13. Geometrical optics. Photometry. Quantum nature of light 14. Special theory of relativity

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14.4.17 3500

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At what minimum potential difference in a flat capacitor do electrons accelerated by the potential $$U = 1$$ MV, flying into the capacitor through a small hole in the lower plate at an angle $\alpha = 30^\circ$ to it, do not reach the upper plate?

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