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There exist uniform magnetic field vec(B...

There exist uniform magnetic field `vec(B)=5T(-hat(j))` from `x=0` to `x=2m`. From `x=2m` to `x=4m` a uniform electric field `vec(E)=50N//C(-hat(k))`. A point chage `(q=2C,m=1kg)` is projected from origin with velocity `vec(V)=20m//s(hat(k))`. Speed with which the charge particle will leave the electric fields is `10sqrt(n)m//s`. Find the value of `n`

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