1. An electron and a proton have charges of an equal magnitude but opposite sign of 1.60 10-19 C. If the electron and proton in a hydrogen atom are separated by a distance of 8.00 10-11 m, what are the magnitude and direction of the electrostatic force exerted on the electron by the proton?

magnitude ________ N

direction--> attractive/repulsive??

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2. A test charge of +8.00 10-6 C experiences a downward electrostatic force of 11 N when placed at a certain point in space. What are the magnitude and direction of the electric field at this point?

magnitude _______ N

direction up/down??

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3. Two positive charges, each of magnitude 3. 10-6 C, are located a distance of 4 cm from each other.

(a) What is the magnitude of the force exerted on each charge?

_______ N

(b) On a drawing, indicate the directions of the forces acting on each charge.

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4. A charge of -3.50 10-6 C is placed at a point in space where the electric field is directed toward the right and has a magnitude of 7.50 104 N/C. What are the magnitude and direction of the electrostatic force on this charge?

magnitude _______ N

direction right/up/left/down??

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5. Two charged particles exert an electrostatic force of 5 N on each other. What will the magnitude of the electrostatic force be if the distance between the two charges is reduced to one-half of the original distance?

___________ N

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6. A charge of +5.00 10-6 C is located 11 cm from a charge of -4.00 10-6 C.

(a) What is the magnitude of the force exerted on each charge?

_________ N

(b) On a drawing, indicate the directions of the forces acting on each charge.