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Pre-Lecture Question 04 To answer this question, first click here to view the associated video Suppose a thin conducting wire connects two conducting spheres. A negatively charged rod is brought near one of the spheres, the wire between them is cut, and the charged rod is taken away. Which one of the following is true? The spheres will attract each other. The spheres will repel each other. There will be no electrostatic force between the spheres When you bring a negatively charged rod near a piece of electrically neutral plastic it attracts it. What happens if you instead bring a positively charged rod near the plastic? It attracts It repels There is no force between the rod and the plastic.Incorrect. Recall that opposite charges attract, and like charges repel Suppose an electron is moving with a constant velocity until it encounters a positively charged sphere on its right. How does the sphere alter the trajectory of the electron? It has no effect on the trajectory of the electron It deflects the electron to the right. It deflects the electron to the left. Impossible to tell

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Answer #1

first two answers are correct, so I will do the third.

Since the sphere is positively charged and electron has negative charge, it will be attracted toward the sphere and hence,

the electron is deflected to the right.So, the 2nd option is correct.

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