Answer:
Effect on electric force
Multiply one charge by 2
The electric force is given by F=kq1q2/r2
From the equation, the force is directly proportional to the charge.
Hence if one charge is doubled, then the electric force is doubled.
Multiply distance by 2
The electric force is given by F=kq1q2/r2
From the equation, the force is inversely proportional to the square of the distance of separation.
If the distance is doubled, F is decreased by 22. This means that the force is multiplied by 1/4.
Effect on electric potential energy
Multiply one charge by 2.
The electric potential energy is given by U=kq1q2/r
From the equation, the electric potential energy is directly proportional to the charge q.
If one charge is doubled, the electric potential energy is doubled.
Multiply distance by 2
The electric force is given by U=kq1q2/r
From the equation, the electric potential energy is inversely proportional to the distance of separation r.
If the distance is doubled, U is divided by 2. This means that the electric potential energy is multiplied by 1/2.
Effect on potential difference
Potential difference is defined as the change in electric potential energy.
Increase in the charge causes an increase in the potential difference and an increase in the distance of separation decreases the potential difference.
