I need help with questions 10 and 11. 10. Two uniformly charged spheres are firm

Question

I need help with questions 10 and 11. 10. Two uniformly charged spheres are firmly fastened to and electrically insulated from frictionless pucks on an air table. The charge on sphere 2 is three times the charge on sphere 1 Which force diagram correctly shows the magnitude and direction of the electrostatic forces? a) A b)B d) D e) E 11. A cylindrical Gaussian surface surrounds an infinite line of charge. The total flux cylinder is through the b) 4xrE c) 2xrE d) 2rLE e) It will require an integration to find out

Explanation / Answer

Answer: E

magnitude of the electrostatic force exerted by 2 on 1 is equal to the magnitude of the electrostatic force exerted by 1 on 2. If the charges are of the same sign, the forces are repulsive; if the charges are of opposite sign, the forces are attractive.

Here the charges have the same sign, so repulsive.

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