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Q. 8

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 623

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Short Answer

The two oppositely charged metal spheres in FIGURE have equal quantities of charge. They are brought into contact with a neutral metal rod. What is the final charge state of each sphere and of the rod? Use both charge diagrams and words to explain.

Final charge state of each sphere and of the rod is neutral.

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Step by Step Solution

Step1: The sphere and metal rod are not in contact.

Initial state diagram showing two charged spheres and a neutral metal rod that are not yet in contact.

Step2: Reaction of Sphere with a metal rod.

Because all three objects are metals (two spheres and one metal rod), they are charge and electricity conductors.

Because spheres have an equal amount of opposing charge, when they come into contact with a neutral metal rod, electrons will transfer from a negatively charged sphere to a positively charged sphere through the metal rod until the entire system reaches electrostatic equilibrium.

Due to an equal quantity of opposite charge in the initial state, the system as a whole will be in a neutral state.

Step3: Whole system in neutral state.

When there is a constant between two spheres over a metal rod and electrons, the system as a whole has a neutral charge.

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