Question

What is the difference between potential and potential energy ?.Why is the potential at infinity 0 ?as I think there the Potential should be highest and the kinetic energy the least.

Answer 1

Dear Student ,
$$\begin{gathered} Electricpotentialistheworkdoneuponaunit+vetestchargetobringitintheelectricfieldofanychargefrominfinity \\ withoutacceleration,whilepotentialenergyisthetotalworkdonetobringtheunitchargefrominfinitytothepointinthe \\ electricfieldwithoutacceleration. \\ Aspotentialenergyispotentialmultipliedbyunit+vecharge,thereforeU=V\times q_0=\left(kq\right)/r\times q_0, \\ r=infinity,thereforeV=zero \\ Assomethingdividedbyinfinityis0,soU=0. \\ Thusherethepotentialenergyisleastandkineticenergyishighest. \end{gathered}$$
Regards