Potential energy is defined ............

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(D) Potential energy is a property of a system in a conservative force field. $1$. It is defined only in conservative fields because the work done by

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All of these

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(D) Potential energy is a property of a system in a conservative force field. $1$. It is defined only in conservative fields because the work done by conservative forces is path-independent. $2$. The change in potential energy $\Delta U$ is defined as the negative of the work done by conservative forces: $\Delta U = -W_c$. $3$. It can also be defined as the work done by an external agent to move a system from one configuration to another without any change in kinetic energy $(\Delta K = 0)$,which equals the change in potential energy. Therefore,all the given statements are correct. The correct option is $D$.

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