The displacement `bar(r )` of a charge Q in an electric field `E= e_(1) hat(i) + e_(2) hat(j) + e_(3) hat(k) " is " bar(r )= a hat(i) + b hat(j)`. The work done is

Options

A. `Q(a e_(1) + b e_(2))`
B. `Q sqrt((a e_(1))^(2) + (b e_(2))^(2))`
C. `Q (e_(1) + e_(2)) sqrt(a^(2) + b^(2))`
D. `(e_(1)^(2) + e_(2)^(2)) (a + b)`

Answer

A