Refer to the figure. Rectangle PQRS repr...

Refer to the figure. Rectangle PQRS represents the cross section of a uniform magnetic field region of 0.20 T. An electron is projected at a speed of `V=2.0xx10^(6)m//s` into the region at an angle of `30^(@)` to the direction of the mangetic field. The length of the magnetic field region is 0.01 m. Find the number of revolutions made by the electron before it leaves the magnetic field region.

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