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A charge particles q enters in a magneti...

A charge particles q enters in a magnetic field `vec(B)=y hat(i) + x hat (j)` with the velocity `vec(v)= x hat (i) y hat (j)` . Neglect any force other than magnetic force. Now answer the following question.
When particle arrives at any point P (2, 2) then force acting on it, will be –

A

Zero

B

`4 sqrt(2)q`

C

`8q`

D

`2 sqrt(2)q`

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