An electric field measured near a point charge of 3.00 × 10^6 C has a strength of 3.00 × 10^-6 N/C. How far is the point from the source charge?
(Points : 3)
0.30 m

0.21 m

0.095 m

0.42 m

Question

An electric field measured near a point charge of 3.00 × 10^6 C has a strength of 3.00 × 10^-6 N/C. How far is the point from the source charge?
(Points : 3)
       0.30 m

       0.21 m

       0.095 m

       0.42 m

anonymous · Answer

@idkwut

matt101 · Answer

You can find your answer using the basic equation for electric field:

$$E={kq \over r^2}$$
Where E is the strength of the electric field, k is Coulomb's constant, q is the charge that is the source of the electric field, and r is the distance away from the source at which you measure the electric field.