Two point charges `Q` and `-3Q` are placed at some distance apart. If the electric field at the location of `Q` is `E` then at the locality of `-3Q`, it is

Options

A. `vec(E)`
B. `-vec(E)`
C. `+(vec(E))/(3)`
D. `-(vec(E))/(3)`

Answer

3

Explanation

`vec(E)=(1)/(4piepsilon_(0))(Q)/(r^(3))vec(r)`