Two small Identical conducting spheres are placed wth their centers 0.63m apart.

Question

Two small Identical conducting spheres are placed wth their centers 0.63m apart. One is gven a charge of 1.2 times 10minus8 C, the other a charge of minus2.0 times 10 minus8 C. Find the electrostatic force exerted on one sphere by the other. Magnitude N attractive direction repulsive The spheres are connected by a conducting wire. Find the electrostatic force between the two after equilibrium is mached, when both spheres have the same charge. Magnitude N attractive direction repulsive Calculate the magnitude and direction of the Coulomb force on each of the three charges shown in the figure below. 6.00 muC charge magnitude N direction

Explanation / Answer

F = K Q1Q2/r^2

= 9 * 10^9 (1.2 * 10^-9 C) ( -2 * 10^-9 C)/(0.63)^2

=-54.42 * 10^-9 N

force is negative so attractive

charges are not clealy visibile I took in nano columb, if the valus are different final answer will change

(b)

Q = Q1 +Q2 = 1.2 nC -2 nC = -0.8 nC

after equlibrium both ends sharge the total charge equally

Q/2 = -0.8 nC /2 = -0.4nC

F = k(Q/2)^2/(0.630)^2

= 9 * 10^-9 ( -0.4 nC)^2/(0.63)^2

= 3.62* 10^-9N

force is poisitve so repulsive

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