An electricity and magnetism problem by Avinash S
Electricity and Magnetism
Level
2
Three particles each having a charge of 10 micro coulombs are placed at the vertices of an equilateral triangle of side 10 cm. find the work done by a person in pulling them apart to infinite separations
-81
-3
9
-27
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1 solution
WORK DONE BY THE PERSON IS = - ( potential energy stored between three charges )
so PE = 3 * [ k * (10 10^-6) *( 10 10^-6)] / (10/100)
so PE = 27 workdone = -27 N-m