In the figure, an a-particle moves a distance $l$ in a uniform electric field $\vec E$ as shown. Does the Electric Field do a positive or a negative work on the a-particle? Does the electric potential energy of the a-particle increase or decrease? |
Negative, increases Positive, decreases Negative, decreases Positive, increases |
Positive, increases |
The correct answer is Option (4) → Positive, increases As α-particle is moving away from electric field. Thus, the work done is positive. and, the potential energy increases. |