SAT Subject Physics Practice Question 596: Answer and Explanation
7. The volt is a measure of electrical potential and may be defined as
A. opposition to electrical motion.
B. number of particles in motion.
C. work per unit charge.
D. field strength per unit of force.
E. electrostatic discharge.
Correct Answer: C
The correct answer is (C). The volt is defined as the force required to move a unit charge through a distance, or the work done per unit charge.