Question

Two charges q and 9c are separated by distance of 10



a.Find the point where the electric field is zero.

Answer 1

let it be zero at a distance x from the 1 C charge

therefore

E1=E2

k*1/x²=k*9/(10a-x)²

((10a-x)/x)²=9

(10a-x)/x=3

3x=10a-x

4x=10a

x=2.5a

Hope this helps