Physics
Grade-9
Easy
Question
A positive charge moves, as shown in the figure. Its Kinetic energy
- Increases
- Decreases
- Remains constant
- Cannot be determined
Hint:
Kinetic energy decreases.
The correct answer is: Decreases
- Method 1- If two like charges move closer, they will repel each other.
- Therefore, the kinetic energy of the positive charge decreases when it moves towards higher potential (positive charge).
- Method 2- Since there is no external force, the mechanical energy of the system remains conserved.
- If two like charges come closer, their potential energy increases. Hence, kinetic energy decreases (for the mechanical energy to be conserved).
- So, the correct option is b.
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