Two conducting spheres have identical radii. Initially they have charges of opposite sign and unequal magnitudes with the magnitude of the positive charge larger than the mag- nitude of the negative charge. They attract each other with a force of 0.27 N when sepa- rated by 0.4 m. (E) Initial ++ The spheres are suddenly connected by a thin conducting wire, which is then removed. Connected Now the spheres repel each other with a force of 0.045 N.

Three charges are placed in the x-y plane. Two charges of 2 nC and 1.5 nC are placed at the points (3,0) and (0,4) respectively. The distances are designated in meters. The constant Ke= 9 x 10^9. Find: 1. The x component of the force on a charge of -4.6 nC placed at (0,0). Please give the value with sign in units of nJ. 2. The y component of the force on a charge of -4.6 nC placed at (0,0). Please give the value with sign in units of nJ. 3. The x component of the Electric field on the same charge from 1 and 2. 4. The y component of the electric field on the same charge from 1 and 2.

See figure. All charges are positive except q3. What is the initial acceleration of q4, which has a mass of 6.50 micrograms? Recall that acceleration is a vector and should be expressed accordingly.

Two charges, q1=-0.3mC and q2=--1.94mC are placed 12.02m apart from one another (mC stand for "milli-Coulomb").  What is the the electric force that q2 experiences due to the presence of q1?  Note, if the force direction is "to the left" be sure to include a negative sign.  If the direction of the force is "to the right", the force should be positive in sign.