Which of the following is the correct definition of the electric potential due to a positive charge Q at a point r from it?
Correct Answer:
D.
Explanation:
The electric potential ($V$) at a distance $r$ from a point charge $Q$ is defined as the amount of work required per unit charge to move a positive test charge from infinity to that specific point. Mathematically, this is expressed by the formula $V = kQ/r$, where $k$ represents Coulomb's constant. This relationship indicates that the potential is directly proportional to the magnitude of the charge and inversely proportional to the distance from it. Because work is a scalar quantity, electric potential is also a scalar, meaning it has magnitude but no direction. Consequently, the correct definition identifies the potential as the work done in bringing a unit positive charge from an infinite distance to the point $r$.
Click below to open Discussion & Feedback
0 Issues
Please
login to comment or Report Issues.