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GUJCET · Physics · Electrostatic Potential and Capacitance
A proton is moving away from an electron then find the change in potential energy of the system.
- A will decrease
- B will increase
- C will remain constant
- D May increase or decrease
Answer & Solution
Correct Answer
(B) will increase
Step-by-step Solution
Detailed explanation
(B)
\(\begin{array}{l} U =\frac{k(e)(-e)}{r} \quad U =-\frac{k e^2}{r} \\ r \text { increases } U =- U \\ \therefore \text { potential energy increases. }\end{array}\)
\(\begin{array}{l} U =\frac{k(e)(-e)}{r} \quad U =-\frac{k e^2}{r} \\ r \text { increases } U =- U \\ \therefore \text { potential energy increases. }\end{array}\)
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