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**Van de Graaff generator? adding a electron??**

## Homework Statement

A)If a Van de Graaff generator is charged to 5,000 volts, how much energy does it take to add and additional electron to the charge on the sphere? If the charge of an electron is -1.6 x 10 ^-19........

B) How would the voltage of the generator in the part A compare to the voltage of a larger Van de Graaff generator with the same amount of charge? To which generator could an electron be addded with the least expenditure of energy?

## Homework Equations

Are there any equations i can apply?

## The Attempt at a Solution

A) I guessed but i dont know if im right or wrong...i multiplied....

5,000 v x -1.6 x10^-19 C = -8 x 10^-16 energy but i think thats wrong can you please help me with the calculations? i dont know to multiply or divide....

B) I need to do A first to understand B...but my guess is that the voltage is the same but the force or work to include a electron would not be much in a larger generator. Its easier to add a electron to a larger Van de Graaff generator with the least expenditure of energy........