Charge by Contact: Net Charges on Each Sphere?

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When a negatively charged rod touches the left sphere, it transfers electrons to that sphere, making it negatively charged. The adjacent sphere, which remains uncontacted, becomes positively charged due to the loss of electrons from the left sphere. After the rod is removed, the left sphere retains its negative charge, while the right sphere holds a positive charge. When the spheres are separated, the left sphere remains negatively charged, and the right sphere remains positively charged. Thus, the net charges on the spheres are negative for the left sphere and positive for the right sphere.
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Homework Statement


Two uncharged spheres are touching (they are held by insulating stands). A negatively charged rod touches the sphere on the left. After, rod is taken away and the adjacent sphere (the one that the rod did not touch) is separated. What are the net charges on each sphere?


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The Attempt at a Solution


After rod is taken away, the 0 charge restores to each spheres touching even before the second sphere is separated from the first that was touched by the rod. OR. the sphere that was touched by the rod is + charged becaused of charging by contact and second sphere that is moved is negatively charged. Which explanation (if any is correct) is right?
 
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Sorry, both are wrong.

This was "charge by contact." The negatively charged rod has transferred electrons to the spheres. So what net charge is on the spheres? (the rod is taken away first, so no electrons are jumping back).
 
Chi Meson said:
Sorry, both are wrong.

This was "charge by contact." The negatively charged rod has transferred electrons to the spheres. So what net charge is on the spheres? (the rod is taken away first, so no electrons are jumping back).

Are they both negatively charged because of the electrons transferred?
 

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