Of the charge Q initially on a tiny sphere, a portion q is to be transferred to a second, nearby sphere. Both spheres can be treated a particles. For what value of q/Q will the electrostatic force between the two parts have 1/4 of the maximum possible value?(adsbygoogle = window.adsbygoogle || []).push({});

q1=Q when the charge is transferred its Q - q

q2=0 becomes q after transfer

F = K(|q1||Q-q|)/r^2

dF(q)/dq = 0

0 = dF/dq = K/r^2 d/dq (qQ - q^2)

then Q - 2q = 0

so q = Q/2

so Fmax is 1/2

My question is, where do i apply the 1/4 of the max. value? im rather confused. I thought it would just be 1/4 of the max.

any help would be appreciated. thanks.

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# Charge Distribution.

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