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AP Physics 2
10.2 Conservation of Electric Charge and the Process of Charging
AdvancedMCQMathematicalConceptual14.3k
Three identical conducting spheres on insulating stands with initial charges.
Three identical conducting spheres on insulating stands with initial charges.
Three identical conducting spheres, \(X\), \(Y\), and \(Z\), are mounted on separate insulating stands. Initially, Sphere \(X\) has a charge of \(+18Q\), Sphere \(Y\) has a charge of \(-6Q\), and Sphere \(Z\) has a charge of \(+2Q\). The following three-step procedure is performed in sequence:

Step 1: Sphere \(X\) is brought into momentary contact with Sphere \(Y\) and then separated.
Step 2: Sphere \(Y\) is then brought into momentary contact with Sphere \(Z\) and then separated.
Step 3: Finally, Sphere \(Z\) is brought into momentary contact with Sphere \(X\) and then separated.

Final Charge on Sphere \(X\)Final Charge on Sphere \(Y\)Final Charge on Sphere \(Z\)
(A)\(+6Q\)\(+4Q\)\(+4Q\)
(B)\(+5Q\)\(+4Q\)\(+5Q\)
(C)\(+6Q\)\(-2Q\)\(+10Q\)
(D)\(+\dfrac{14}{3}Q\)\(+\dfrac{14}{3}Q\)\(+\dfrac{14}{3}Q\)

Which row in the table correctly identifies the final electric charge on each sphere?

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