The electric potential decreases uniformly from 120V to 80V as one moves on the x-axis from x = –1 cm to x = +1 cm. The electric field at the origin

Question

Philoid · Accepted Answer

Here also, and

Upon solving, we get but it will also depend on the angle that equipotential surface makes with the X axis.

Therefore, the value of electric field may greater than 20V/cm (if the potential decreases uniformly) or equal to 20 V/cm (when equipotential surfaces are at right angles from X axis.)