Question

It takes a proton 71 seconds to cross a potential difference of 101000V what is the average power expended by the electric field

Answer 1

Answer

the average power expended by the electric field is given by

$P=Vi=\frac{Vq}{t}\\=\frac{ 101000\times1.6\times10^{-19} }{71} \\=2.276\times10^{-16}Watts$