6. Electricity and Magnetism
Coulomb's Law — Quiz
Test your understanding of coulomb's law with 5 practice questions.
Practice Questions
Question 1
Which of the following describes the relationship between the electrostatic force and the product of the magnitudes of the charges?
Question 2
Consider two point charges, $q_1$ and $q_2$, separated by a distance $r$. If the magnitude of both charges is halved, how does the electrostatic force ($F$) between them change?
Question 3
Two charges, $q_1 = +2 \text{ \mu C}$ and $q_2 = +5 \text{ \mu C}$, are separated by a distance of $0.1 \text{ m}$. Given Coulomb's constant $k = 9 \times 10^9 \text{ N \cdot m}^2 / \text{C}^2$, calculate the magnitude of the electrostatic force between them.
Question 4
In a system with two positive charges and one negative charge, if the negative charge is placed exactly midway between the two positive charges, what is the direction of the net electrostatic force on the negative charge?
Question 5
What is the SI unit for electric charge?