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A particle of charge +q and mass m movin...

A particle of charge `+q` and mass m moving under the influence of a uniform electric field `E hati` and a magnetic field `Bhatk` enters in I quadrant of a coordinate system at a point `(0,a)` with initial velocity `v hati` and leaves the quadrant at a point
`(2a.,0)` with velocity `-2vhatj` Find
(aq) Magnitude of electric field at point `(0,a)` (C ) Rate of work done by both the fields at `(2a,0)` .

Text Solution

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`(3mv^(2))/(4qa)`
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