The potential at a point x (measured in μ m)due to some charges situated on the x-axis is given by V(x)=20/(x²−4) volt, then electric field intensity at x=4 μm is given by
A. 5/3 V/μm and in the negative x−direction.
B. 5/3 V/μm and in the positive x−direction.
C. 10/9 V/μm and in the negative x−direction.
D. 10/9 V/μm and in the positive x−direction.
