Two small identical conducting spheres are placed with their centers 0.63 m apart. one is given a charge of 12 x 10^−9 c, the other a charge of −23 x 10^−9 c. (a) find the electrostatic force exerted on one sphere by the other. magnitude n direction (b) the spheres are connected by a conducting wire. find the electrostatic force between the two after equilibrium is reached, where both spheres have the same charge. magnitude n direction

a) , attractive.

b) , repulsive.

Explanation:

We use Coulomb's Law to calculate the electrostatic force between 2 charges and separated a distance r:

Where is Coulomb's constant.

a) At the beginning we then have:

Since their signs are different it will be attractive.

b) The total charge must be conserved, which is:

So now each charge will have a charge half this value

And the force will be:

Since their signs are the same it will be repulsive.

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