If we double the charge on two point charges, and double the distance between them, how much does the electric force between them change?
A)doubled
B)halved
C)remains the same
D)four times larger

Question

Quizplus · Accepted Answer

Doubling the charge on both charges increases the force by a factor of 4 (since force is proportional to the product of the charges), but doubling the distance decreases the force by a factor of 4 (since force is inversely proportional to the square of the distance). These changes cancel each other out, so the force remains the same.

If We Double the Charge on Two Point Charges, and Double