1.

The work done by the charge Q through displacement Delta vecr = a hati +b hatj in electric field vecE= E_(1)hati +E_(2) hatj is ............

Answer»

`Q [E_(1)a +E_(2)B]`
`Q[sqrt((E_(1)a)^(2)+(E_(2)b)^(2))]`
`(Q(E_(1)+E_(2)))/(sqrt(a^(2)+b^(2)))`
`Q(sqrt(E_(1)^(2)+E_(2)^(2)))sqrt(a^(2)+b^(2))`

SOLUTION :`W = VECF . Delta vecr = Q vecE.Delta vecr`
`=Q (E_(1) hat+E_(2)HATJ). (ahati+b hatj)`
`:. W = Q ( E_(1) a +E_(2)b)`


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