Figures shows an electric line of force which curves along a circular arc.The magnitude of electric field intensities is same at all points on this curve and is equal to `E`.If the potential at `A` is `V` ,the potential at `B` is

Options

A. `V-Ertheta `
B. `V-E2Rsin""(theta)/(2)`
C. `V+ER `theta`
D. `v+2ER sin(theta)/(2)`

Answer

A

Explanation

`vec(E)=-((delV)/(delx)hat(i)+(delV)/(dely)hat(j)+(delV)/(delz)hat(k))`