Physics
Grade-9
Easy
Question
A positive and a negative charge are released from rest in vacuum. They move towards each other. As they do,
- A positive potential energy becomes more positive.
- A positive potential energy becomes less positive.
- A negative potential energy becomes more negative.
- A negative potential energy becomes less negative.
Hint:
Potential energy is directly proportional to the product of 2 charges and inversely proportional to the distance between them.
The correct answer is: A negative potential energy becomes more negative.
- U= KQ1Q2/r
- Where, r= distance, Q= charge, U= potential energy, K is a constant.
- Potential energy is directly proportional to the product of charges and inversely proportional to the distance between them.
- Given charges are unlike and moving towards each other means the potential energy is negative and increasing more in negative.
- So, the correct option is c.
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