CP PHYSICSName: ______

ELECTROSTATICS REVIEW

Answer the following questions on your own sheet of paper.

1.Know the following vocabulary terms:

ion / friction / lines of force
conservation of charge / conduction / electrical potential energy
conductor / induction / electrical potential
insulator / grounding / voltage
semiconductors / polarization / capacitor
superconductors / electric field

2.What charged particles are located in an atom? Identify their charges.

3.When is an atom neutral in charge?

4.What is the fundamental rule regarding charge interactions?

5.How are positive ions formed? How are negative ions formed?

6.Which materials tend to become positively charged?

7.Which materials tend to become negatively charged?

8.Can charges be created or destroyed?

9.What happens to the electrical force experienced by two charged particles separated

by some distance if:

a. one of the charges doubles?

b. both of the charges double?

c. the distance is reduced to half?

d. the distance is doubled?

e. one of the charges doubles and the distance is doubled?

f. both of the charges double and the distance is doubled?

10.What are some examples of conductors?

11.What are some examples of insulators?

12.Explain how charging an object occurs using (in detail):

a. friction

b. conduction

c. induction

13.What occurs during a thunderstorm that results in lightning?

14.Compare and contrast the characteristics of electric force and gravitational force.

15.How are electric fields shown?

16.Draw electric fields for the following:

a. a positive charge with a strong field

b. a negative charge with a weak field

c. two positive charges

d. two negative charges

e. a negative charge and a positive charge

f. two plates – one is positive and the other is negative

17.What is electric shielding?

18.Why is your car one of the safest places to be during a thunderstorm?

CP PHYSICS, ELECTROSTATICS REVIEW, page 2

19.What is another name for electric potential?

20.Why is it safe to touch a charged balloon which has a very high voltage?

21.A positive charge of 3.2 x 10-5 C is located 0.85 m away from another positive charge of 7.4 x 10-6 C. What is the electric force between the two charges?

22.Two identical charges of 1.78 x 10-6 C are separated by a distance of 2.75 cm. What electrical force do they exert on each other?

23.How far apart are two positive charges if they experience a force of 1.34 N. One has a charge of 2.7 x 10-4 C and the other has a charge of 5.1 x 10-4 C.

24.A negative charge of 3.9 x 10-5 is located 0.23 m from a positive charge of

6.5 x 10-5. What electrical force do they exert on each other?

25.Two negative charges are located 0.020 m apart. They exert 785 N of

electrical force on each other. If one of the charges is 5.0 x 10-6 C, then

what is the value of the other negative charge?