An electrostatic field $$E$$ of magnitude $$10\ N/C$$ is directed along positive $$x-axis$$. A point charge of $$10^{-6}$$ is shifted from $$A(1m,0, 0)$$ to $$B(2m, 0, 1m)$$, then from point $$B$$ to $$C(0, 0, 0)$$, the work done by electrostatic force is