Question

A charge Q creates an electric field. A test charge q is usedto measure the strength of the electric field at a distance d from Q. The electric field strength is defined as ____

Answer 1

`E=(1)/(4\pi.\epsilon_o) * (Q)/( d^2)`

Step-by-step explanation:

In the given question we have a test charge q at a distance of d from form another charge Q which creates the field.

The electric field strength is force force per unit test charge, according to the Coulomb's law the force between two charges is given as:

`F=(1)/(4\pi.\epsilon_0) * (Q.q)/(d^2)`

where:

`\epsilon_0=` permittivity of free space

Therefore,

`E=(F)/(q)`

`E=(1)/(4\pi.\epsilon_o) * (Q)/( d^2)`