An electrical charge `2xx10^-8` C is placed at the point `(1,2,4)` m. At the point `(4,2,0) `m, the electric

Options

A. potential will be 36 V
B. field will along y-axis
C. field will increase if the space between the points is filled with a dielectric
D. All of the above

Answer

A

Explanation

`r=sqrt((4-1)^2+(2-2)^2+(0-4)^2)`
`=5m`
`V=1/(4piepsilon).q/r`
`=((9xx10^9)(2xx10^-8))/5=36V`
Field is in the direction of `r=r_p-r_q`