change in electron's electric potential energy?
During a particular thunderstorm, the electric potential difference between a cloud and the ground is Vcloud - Vground = 4.30 108 V, with the cloud being at the higher potential. What is the change in an electron's electric potential energy when the electron moves from the ground to the cloud?
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The potential energy change is voltage change times charge:
∆EPE
= ∆V·Q
= ( 4.30 × 10^8 V )( -1.602 × 10^-19 C )
= -6.89 × 10^-11 J ◄---
It lost electrical potential energy.