Electric Force, Field, and Potential

What does the law of conservation of electric charge state?

Two identical metal spheres have charges of +4q and -2q, respectively. They are brought into contact and then separated. What is the final charge on each sphere?

Two point charges, $q_1$ and $q_2$, are separated by a distance $r$. If both charges are doubled, and the distance between them is also doubled, what happens to the electric force between them according to Coulomb's Law?

Three charges are arranged in an equilateral triangle. Charges $q_1$ and $q_2$ are positive, and $q_3$ is negative. What is the direction of the net electric force on $q_3$?

A uniformly charged ring of radius R has a total charge Q. What is the electric field at a point on the axis of the ring, a distance x from the center?

What is the relationship between electric potential and electric potential energy?

A charge of +3 $\mu$C is moved from a point with an electric potential of 10 V to a point with an electric potential of 30 V. How much work is done by the electric field?

Two point charges, one positive and one negative, are separated by a certain distance. Which of the following statements is true regarding the electric force between them?

What is the definition of an electric field?

Two points, A and B, are in a uniform electric field of magnitude 100 N/C. Point A is 0.2 m away from point B in the direction of the field. What is the electric potential difference between points A and B?