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An electron enters the space between the plates of a charged capacitor as shown. The charge density on the plate is . Electric intensity in the space between the plates is E. A uniform magnetic field B also exists in the space perpendicular to the direction of E.The electron moves perpendicular to both E and B without any change in direction. The time taken by the electron to travel a distance l in the space is

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$(C) \large\frac{\in_0 lB}{\sigma}$
answered Jun 24, 2014 by meena.p

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