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(A) Two electric field lines cannot cros...

(A) Two electric field lines cannot cross each other. Also, they cannot crossed loops. Give reasons. (B) A particle of charge 2 `muC` and mass `1.6` g is moving with a velocity `4 hati ms^(-1)`.At `t=0` the particle enters in a region having an electric field `vecE`( in `NC^(-1)`) = `80hati + 60hatj`. Find the velocity of the particle at `t =5 s`

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