1. How many electrons make up a charge of -30 C? 2. What is the magnitude of the force a +25 C charge exerts on a +3.0

mC charge 35 cm. away?

3. A balloon rubbed against denim gains a charge of -8.0 C. What is

the electric force between the balloon and the denim when the two

are separated by a distance of 5.0 cm( Assume that the charges are

located at a point).

4. A small cork with an excess charge of +6 C is placed 0.12 m from

another cork, with carries a charge of -4.3 C.

a. What is the magnitude of the electric force between the corks?

b. Is this force attractive or repulsive?

c. How many excess electrons are on the negative cork?

d. How many electrons has the positive cork lost?

5. What are the magnitude of and direction of the electric force on an

electron in a uniform electric field of strength 2360 N/C that points

due east?

6. A downward force of 8.4 N is exerted on a -8.8 C charge. What are

the magnitude and the direction of the electric field at this point?

7. *What is the magnitude of the acceleration experienced by an

electron in an electric field of 750 N/C? How does the direction of

the acceleration depend on the direction of the field at that point?

8. *An electron is released from rest in a uniform electric field and

accelerates to the north at a rate of 115 m/s2

. What are the magnitude

and direction of the electric field?

9. Draw approximately, the electric field lines about two point charges

+Q and -3Q which are a distance l apart.​