The potential difference between the two sides of an ordinary electric outlet Is

Question

The potential difference between the two sides of an ordinary electric outlet Is 120V. How much energy does an electron gain when it moves from one side to the other? The potential difference between the two sides of an ordinary electric outlet Is 120V. How much energy does an electron gain when it moves from one side to the other? The potential difference between the two sides of an ordinary electric outlet Is 120V. How much energy does an electron gain when it moves from one side to the other?

Explanation / Answer

When electron is moving from one side (-ve) to other (+ve) side then potential difference is given by:

V = W/ q

here V = potential difference= 120V, W = work done by electron in moving from one end to other

q = e = 1.6*10-19 C = charge on electron

So W = V*q

this work done will store in form of energy,

Energy( E) = W = V*q

E = 120*1.6*10-19

E = 1.92*10-17 J

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