Q. Three charged particles are placed at each of three corners of an equilateral triangle whose sides are of length 3.7 . Two of the particles have a negative charge: = -6.9 and = -13.8 . The remaining particle has a positive charge, = 8.0 . What is the net electric force acting on particle 3 due to particle 1 and particle 2?
Q. Two devices with capacitances 25µF and 3.2µF are each charged with separate 148 V power supplies.
Calculate the total energy stored in the two capacitors.