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A metal sphere with a charge of +2 x 10-5 C is 10 cm from another...

A metal sphere with a charge of +2 x 10-5 C is 10 cm from another identical metal sphere with a charge of -4 x 10-5 C. The two spheres are brought in contact and again separated by 10 cm. Find the charge on each sphere.

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Answer #1

(a)

Let be the charges on the identical metal spheres. Now, when the metal spheres are brought in contact it acts one big metal sphere with a net charge and the total charge gets equally distributed between the two- metal spheres when they are separated.

After separation the charge on the each metal sphere are

  

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