The figure shows four identical conducting spheres that are actually well separa

Question

The figure shows four identical conducting spheres that are actually well separated from one another. Sphere W (with an initial charge of zero) is touched to sphere A and then they are separated. Next, sphere W is touched to sphere B (with an initial charge of -28e) and then they are separated. Finally, sphere W is touched to sphere C (with an initial charge of 46e), and then they are separated. The final charge on sphere W is 14e. What multiple of e gives the initial charge on sphere A? Number 37 Units This answer has no units

Explanation / Answer

Charge on W before touching C = 14e *2 - 46e = -18e

Charge on W before touching B = -18e *2 - -28e = -8e

initial charge of A = 2*-8e = -16e   

Hence -16 multiples

answer :   -16

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