Electricity+Review+Questions

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=EXAM REVIEW: PHYSICS=

1a. What is the charge of a protons?

1b. What is the charge of an electron?

1c. What is the charge of a neutron?

2a. What is static electricity?

2b. What is current electricity?

3. Complete the following table.

(Static or Current) ||  ||   ||
 * || **INSULATOR** || **CONDUCTOR** ||
 * Type of Electricity
 * Examples ||  ||   ||

4. List the 3 parts of the Law of Electric Charges.

i. Like charges... ii. Unlike charges... iii. Charged objects...

5. Complete the following table.


 * **Object A** || **Object B** || **Attract or Repel** ||
 * positive || positive ||  ||
 * neutral || positive ||  ||
 * negative || neutral ||  ||
 * positive || negative ||  ||
 * negative || negative ||  ||

6. Using the Electrostatic Series, determine the charges of the following objects.

a. Glass rubbed with plastic Glass = Plastic =

b. Calcium rubbed with platinum Calcium = Platinum =

c. Cotton rubbed with silk Cotton = Silk =

d. Carbon rubbed with acetate Carbon = Acetate =

e. Wax rubbed with hair Wax = Hair =


 * Electrostatic Series
 * Weak hold**

Acetate Glass Fur, Hair Calcium Silk Aluminum Cotton Wax Ebonite Plastic Rubber Carbon Sulfur Platinum Gold


 * Strong hold** ||

f. If acetate has a weak hold on electrons it will _ _ _ (lose/gain) electrons when rubbed with rubber, which has a strong hold on electrons.

7. What are the three methods of charging an object?

i. ii. iii.

8. Complete the following table of circuit diagrams.


 * **TERM** || **DEFINITION** || **SYMBOL** ||
 * Cell ||  ||   ||
 * || A combination of cells ||  ||
 * Conductor/Wire || Path that carries electric current ||  ||
 * Load || Resists flow of electrons ||  ||
 * Switch ||  ||   ||
 * Light Bulb || Device within a circuit ||  ||
 * Motor || Device within a circuit ||  ||
 * Ammeter ||  ||   ||

9a. In an electric circuit, where do electrons leave from and return to?

9b. In an electric circuit, what do electrons move through?

10a. If the switch in a circuit is open, what does it mean?

10b. If the switch in a circuit is closed, what does it mean?

11a. What is a series circuit?

11b. What is a parallel circuit?

12. Draw the following series circuits, using arrows to show the direction of electron flow.

Will the light bulb light up? _ _ _ || Cell, open switch, ammeter, closed switch, resistor, light bulb, closed switch
 * 2-cell battery, closed switch, light bulb, motor

Will the light bulb light up? _ _ _ ||

13. Complete the following table.


 * **VARIABLE** || **SYMBOL** || **UNIT** ||
 * Charge ||  ||   ||
 * Current ||  ||   ||
 * Potential Difference/Voltage ||  ||   ||
 * Resistance ||  ||   ||
 * Power ||  ||   ||
 * Energy ||  ||   ||

14a. What does an ammeter measure?

14b. What does a voltmeter measure?

15a. What is the formula for Ohm’s Law?

15b. Using the variables in Column A, solve for the variable in Column B by writing the correct formula in Column C.


 * **COLUMN A** || **COLUMN B** || **COLUMN C** ||
 * I, t, Q || Q = ? || Q = I x t ||
 * R, V, I || I = ? ||  ||
 * E, P, t || E = ? ||  ||
 * V, I, P || P = ? ||  ||
 * V, E, Q || E = ? ||  ||

**//For #16-22, remember to solve the questions using the GRASP format//**

16. A heater has a resistance of 8.0 Ω when it is plugged into a 110 V outlet. What is the current?

17. A light bulb uses 1.24 A of current from a 120 V generator. The generator runs for 5 mins. Solve for energy.

18. A toaster is connected to 110 V source. 660 W of power is lost as heat. What is the current?

19. If 8 C of charge gains 36 J of energy, what is the potential difference?

20. How much energy is used to boil water it if has 600 C of charge and a potential difference of 120 V?

21. What is the resistance of 1400 W hair dryer plugged into a 120 V outlet with a 10 A current flowing through it?

22. Calculate the power of a vacuum if the voltage is 120 V and current is 7.9 A.

23. Complete the following Formula Table.

Current (I) ||  ||   || Potential Difference (V) ||  ||   || Resistance ||  ||   ||
 * **COMPONENT** || **SERIES CIRCUIT FORMULA** || **PARALEL CIRCUIT FORMULA** ||

**//For #24-27, remember to solve the questions using the GRASP format//**

24. Solve for equivalent resistance (RT) when a 4 Ω bulb and 6 Ω bulb are connect in:

a) Series

b) Parallel

25. Identify the following circuits as __series__ or __parallel.__



26. Ms. Suokas conducted an electricity experiment involving Ohm’s Law. During the experiment, she measured both the potential difference (V) and noted the current (I). In the table below are Ms. Suokas’ experimental results.


 * Current (A) || Voltage (V) ||
 * 0.5 || 1.4 ||
 * 1.0 || 2.2 ||
 * 1.5 || 3.7 ||
 * 2.0 || 4.9 ||
 * 2.5 || 6.1 ||
 * 3.0 || 7.3 ||

a) Plot the information on the graph below b) Draw the line of best fit c) Find the resistance d) What is the voltage when current is 0.18 A? _ e) What is the current when voltage is 6.0 V? _

**//REMEMBER TO TITLE YOUR GRAPH AND AXES!!!//**