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A particle of mass m and charge (-q) ent...

A particle of mass m and charge (-q) enters the region between the two charged plates initially moving along x-axis with speed v_x. The length of plate is L and an uniform electric field E is maintained between the plates. Show that the vertical deflection of the particle at the far edge of the plate is `qEL^2//(2m v_x^2)`.

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PSEB-ELECTRIC CHARGES AND FIELDS -EXERCISE
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  18. Consider an arbitrary electrostatic field configuration. A small test ...

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  20. Suppose that the particle is an electron projected with velocity vx = ...

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