Two charges are 82.89m apart from one another. If charge 1 has a charge of 7.96μC and charge 2 has a charge of -8.13μC, then what is the magnitude of the net electric field at a point in the exact middle of the two charges?

2 narrow, flat metal plates are positioned vertically, 20.00 cm. The first plate has a positive charge with charge density σ=+630.0 mC/m2 and a second plate has an equal but opposite negative charge with charge density σ=-6300.0 mC/m2 . There are also two narrow, flat metal plates positioned horizontally, 30.00 cm apart, with the top plate given a negative charge, and the bottom plate given an equal but opposite positive charge, such that the electric potential of the bottom plate is 5.00 V higher than the top plate. A small sphere with a mass of m =64.35 g, and a charge of q =22.00 mC is attached to a narrow, stiff, massless, insulating rod with a length of L= 8.00 cm, which is pivoted at point O, which is 2.000 cm from the second plate. The sphere/rod unit is angled at 5 degrees with horizontal and released from rest. Will the sphere/rod ever hit an angle of 0 degrees with the horizontal? If so, how long will it take to reach that point?

Two point charges, −15.0 μC and +12.0 μC, are kept 6.60 cm apart.     What is the magnitude of the electric field midway between the two point charges?

Point charges of 5.205.20 µC and −3.80−3.80 µC are placed 0.2700.270 m apart, with the −3.80−3.80 µC charge being placed to the right. Where can a third charge be placed so that the net force on it is zero? Give your answer as a displacement from the −3.80−3.80 µC charge. (Define the positive direction to be to the right.)

A force of (6.72x10^0) N is exerted on a (8.0540x10^O) µC charge. What is the magnitude of the electric field at this point? Give your answer in N/C, using 3 sf. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer