Question

A point charge is placed 3 m from a 4 µC charge. What is the strength of the electric field on the point charge at this distance? (Round to the nearest whole number.)

Answer 1

the answer is 4,000 newtons per coulomb on edge

Answer 2

The strength of the electric field generated by the charge is given by:

`E(r)=k (q)/(r^2)`
where
k is the Coulomb's constant

`q=4 \mu C=4 \cdot 10^(-6)C` is the magnitude of the charge

`r=3 m` is the distance at which we want to calculate the field

Substituting the numbers into the equation, we find

`E=(8.99 \cdot 10^9 Nm^2C^(-2)) (4 \cdot 10^(-6) C)/((3 m)^2)=4000 N/C`