The electrostatic potential energy of two spheres

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Homework Statement


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Homework Equations


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The Attempt at a Solution


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Is my answer correct ?
 

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  • #2
kuruman
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Yes.
 
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  • #3
TSny
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If you substitute ##Q_1 = 4Q## and ##Q_2 = 4Q## into ##\frac{k Q_1 Q_2}{L}##, do you get an overall factor of 4 in the answer?
 
  • #4
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If you substitute ##Q_1 = 4Q## and ##Q_2 = 4Q## into ##\frac{k Q_1 Q_2}{L}##, do you get an overall factor of 4 in the answer?
##\frac{16 k Q}{L}## .
 
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If you like puzzles, compare the initial potential energy of the two spheres with the final potential energy of the two spheres. Did the energy increase, decrease, or stay the same?
 

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