Physics Question - Straightening the graph Electrostatic Force?

Coulomb started with two identical charges spheres at a distance R. The force between them is F. If the charged sphere separation is changed to 2/3 R, then the force between them is becoming...

Update:

a) 4/9 F

b) 2/3 F

c) 3/2 F

d) 9/4 F

2 Answers

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  • 1 month ago
    Best Answer

    F is proportional to 1/ r^2

    F2/F = r^2 / ( 2/3 r^2) =9/4

  • oubaas
    Lv 7
    1 month ago

    F = k/d^2

    F' = k/(d*2/3)^2 = k*9/(4d^2) = 9F/4

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