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Name _______________________________________ Period _____ Date _____________________
ELECTRICITY AND MAGNETISM TEST REVIEW
Objectives
1. Know what subatomic particles have charge.
2. Describe the properties of static electricity.
3. Know how to charge something with static electricity using friction, induction, and conduction.
4. Distinguish between conductors and insulators.
5. Describe how electric current is different from static electricity.
6. Describe current, resistance, and voltage and know their relationships to each other.
7. Compare and contrast series and parallel circuits.
8. Explain and calculate electrical power.
9. Describe the properties of a magnet.
10. Explain how a magnet exerts a force on an object.
11. Explain why some materials are magnetic and others are not – be sure to mention magnetic domains.
12. Understand the relationship between electric current and magnetism.
13. Explain how electromagnets are constructed and describe how they are used.
14. Compare and contrast an electric motor and an electric generator.
15. Distinguish between alternating and direct current; know what produces each.
16. Know the thirty vocabulary words.
17. Know the four SAT vocab words.
Review
Write the correct unit for measuring each of the following physical quantities.
__________________ 1. electrical current
__________________ 2. Resistance
__________________ 3. electrical power
__________________ 4. voltage
5. Mrs. Brim rubs a balloon on her hair. The balloon becomes negatively charged. What kind of charge does
Mrs. Brim’s hair have now? __________________ What is the atomic particle with that charge?
___________________________
6. Draw a picture showing the charges on
Mrs. Brim and the balloon:
7. Explain how Mrs. Brim AND the balloon
got their static charges.
8. Explain how static electricity is formed in each and give and example.
a. Charging by Friction:
b. Charging by Induction:
c. Charging by Conduction:
9. Label each of the following as an electrical conductor (C) or insulator (I):
_____ Copper
_____ Aluminum
_____ Glass
_____ Air
_____ Plastic
_____ Iron
_____ Rubber
_____ Salt Water
_____ Steel
_____ Gold
_____ Wood
_____ Silver
10. Will the following attract (A) or repel (R)?
_____ Two positive charges _____ Two negative charges _____ One positive charge & one negative charge
11. Diagram a circuit with three resistors (bulbs) in series.
Make sure you use the correct circuit symbols for
every component!
12. Diagram a circuit with three resistors (bulbs)
in parallel. Make sure you use the correct
circuit symbols!
13. Diagram a circuit with two resistors in parallel, and one
resistor in series with the parallel component to the right.
Make sure you use circuit symbols!
Match the following definitions with the correct terms. Not all terms will be used.
_____ 14. The region around a magnet that can exert forces on other magnetic
materials
_____ 15. A group of particles in a magnetic material whose magnetic fields line up with
each other
_____ 16. The three magnetic elements
_____ 17. The strongest part of a magnet
_____ 18. A magnet that can be turned on and off using electricity
A.
B.
C.
D.
E.
Iron, cobalt, nickel
Magnetic Poles
Magnetic Fields
Magnetic Domains
Electromagnetic
Induction
F. Electric Motor
G. Electric Generator
H. Electromagnet
I. Aluminum, Iron,
Sodium
_____ 19. A process where electric current is produced from moving a magnet through a
coil of wire
_____ 20. A device that uses mechanical energy to produce electrical energy
_____ 21. A device that uses electrical energy to produce mechanical energy
Fill in the blank.
22. Resistance is the _______________________________ of the flow of electricity.
23. Voltage is a measure of the ______________________________ of the electrical flow.
24. In an equation,”I” is used to represent ____________________.
25. The SI unit for electric power is the ____________________.
26. The unit for electric energy is the ____________________.
27. Current is a measure of the _____________________ of electricity.
28. To convert from Watts to kilowatts, ____________________ by 1000.
29. In the electric energy equation, time is measured in _______________ and power is measured in
___________________.
Problem-Solving – write what you know, the formula, plug the numbers in with units and give the correct answer
with units.
30. How much current is used when a 15ohm hairdryer is connected to a 120 volt outlet?
31. What is the resistance of Mrs. Brim’s Smartboard if it draws 2.5 amps of current when it is plugged into a
120V outlet?
32. A laser pointer has a current of 0.15amp that moves through a 20 Ω resistance. How much voltage needs to be
supplied by the battery?
33. Look at the circuit to the right, and answer the questions.
a. What type of circuit is it? _____________________________
b. Draw the path of the current on the diagram.
c. What is the total voltage across the bulbs? ___________
d. What is the total resistance of the circuit? _________
e. What is the current in the circuit? _________
34. Look at the circuit to the right, and answer the questions.
a. What type of circuit is it? _____________________________
b. What is the voltage across each resistor? ___________
c. What is the current in each branch?______________
d. What is the total current provided by the battery? _________
35. A circuit contains a 12 V battery and a 480 Ω resistor. The current through the circuit is 0.025 Amps. What
electrical energy (in kWh) does this circuit use in 1.5 hours? Solve for POWER first, then solve for
ENERGY.
36. Draw the magnetic lines of force for each of the pictures.
a.
b.
37. Complete the following:
a. Like poles of a magnet _______________________ and opposite or unlike pole _______________________.
b. The moving electron acts as a mini ________________________ charge and therefore has a
_______________________ field associated with it.
c. Groups of atoms with magnetic poles aligned are called _______________________________.
d. Oersted's experiment showed that every _______________________________ has a magnetic field
surrounding it.
38. Explain why some materials are magnetic and others are not – be sure to mention magnetic domains.
39. Describe how to make an electromagnet.
40. Describe TWO ways to make an electromagnet stronger.
41. Fill in the blanks below with information on electric generators and electric motors.
a. Electric generators convert ________________________ energy into ___________________________
energy.
b. Electric motors convert _________________________ energy into __________________________ energy.
c. The purpose of an electric ________________________ is to produce movement within a machine to rotate or
turn a part.
d. Power plants use electric ___________________________________ to product electricity.
42. Describe alternating current and contrast it with direct current. Give an example of something that produces
each current.