Concept explainers
Can a particle ever move from a region of low electric potential to one of high potential and yet have its electric potential energy decrease?
Answer to Problem 5Q
Solution:
A particle can move from a region of low electric potential to one of high potential and yet have its electric potential energy decrease
Explanation of Solution
We have potential difference between two points, , where is the potential energy and q is the charge.
Now consider a negative charge is released, it will move towards positive plate. Because of the acceleration of the charge its kinetic energy increases. When kinetic energy increases potential energy decreases. i.e. and , so potential difference between 2 points is positive. Which means negative charge moves to a region of higher potential. So, a particle can move from a region of low electric potential to one of high potential and yet have its electric potential energy decrease.
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