• question_answer A graph of the x-component of the electric field as a function of x in a region of space is shown. The y and z components of the electric field are zero in this region. If the electric potential is $10\text{ }V$at the origin, then potential at $x=2.0\text{ }m$is A) $10V$  B)        $40V$ C) $-10V$ D)        $30V$

[d] Work done by electric field $=\frac{1}{2}\left( -20 \right)\times 2=-20V$ $\Delta V=-WE=20V$ ${{V}_{x}}=2.0m=20+10=30V$