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1. Two charges are placed between the plates of a parallel plate capacitor. One charge is...

1. Two charges are placed between the plates of a parallel plate capacitor. One charge is +q1 and the other is q2 = +4.66mC (microC). The charge per unit area on each plate has a magnitude of sigma = 1.27×10-4C/m2. The force on q1 due to q2 equals the force on q1 due to the electric field of the parallel plate capacitor. What is the distance r between the two charges?

2. Two identical small insulating balls are suspended by separate 0.258m threads that are attached to a common point on the ceiling. Each ball has a mass of 7.87×10-4kg. Initially the balls are uncharged and hang straight down. They are then given identical positive charges and, as a result, spread apart with an angle of 32.2o between the threads. Determine the charge on each ball.

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