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Physical Science
Chapter 6
Worksheet 1
Name ________________________
Period________________________
Match the correct definition to the word or phrase
____
1. Static electricity
A. Related to the force that causes electric charges to
flow
____
2. Electric field
____
3. Voltage difference
B. States that the current in a circuit equals the voltage
difference divided by the resistance
C. A device, sometimes consisting of two leavers of
metallic foil, used to detect electric charge
____
4. Electric current
____
5. Electroscope
____
6. Charging by contact
____
7. Resistance
F. Circuit in which electric current has more than one
path to follow
G. The accumulation of excess charge on an object
____
8. Series circuit
H. A closed path that electric current follows
____
9. Insulator
I.
States that charge can be transferred from one object
to another but it cannot be created or destroyed
____
10. Ohm’s law
J.
The rearranging of electrons on a neutral object
caused by bringing a charged object close to it
____
11. Electrical power
____
12. Charging by induction
____
13. Law of conservation of charge
K. Circuit in which electric current has only one path to
follow
L. The net movement of electric charges in a single
direction
M. A region surrounding every electric charge in which a
force of attraction or repulsion is exerted on other
electric charges
____
14. Parallel circuit
N. Material through which electrons can move easily
____
15. Conductor
O. Rate at which electrical energy is converted to another
form of energy
____
16. Electric circuit
P. Tendency for a material to oppose electron flow and to
convert electrical energy into other forms of energy
D. The transferring of electric charge between objects by
touching or rubbing
E. Material in which electrons and thermal energy are not
able to move easily
Circle the letter that corresponds to the correct answer
17. An electric iron is rated at 800 watts. This tell you the
a. potential difference of the iron
b. amount of current it takes
c. rate at which it uses electric energy
d. total amount of energy it uses
18. When a vinyl strip is stroked with wool
a. new negative charges are produced on the wool
b. new negative charges are produced on the vinyl
c. new positive charges are produced on the vinyl
d. the total amount of charge does not change
19. Which unit measures the number of electrons passing through an electrical appliance per
second?
a. watt
b. volt
c. ampere
d. ohm
20. If two positively charged objects are put close together, they will
a. attract each other
b. have no charge
c. produce an electric current
d. repel each other
21. The reason a switch must be placed in series with the device it controls is that
a. when a series circuit is opened the current stops
b. the switch must use some of the energy of the circuit
c. there must be a high potential difference across a closed switch
d. there must be no current passing through the switch
22. Resistance in wires
a. Increase current
b. Destroys energy in a circuit
c. Converts electrical energy to other forms of energy
d. Converts other forms of energy to electrical energy
23. Which is a conductor?
a. Glass
b. Wood
c. Copper
d. Plastic
24. The electric force between two charged objects depends on which of the following?
a. Their masses and their separation
b. Their speed
c. Their charges and their separation
d. Their masses and their charges
25. Which does not provide a significant voltage difference in a circuit?
a. Wet cell
b. Wires
c. Electrical outlet
d. Dry cell
26. Which is the rate at which appliances convert electrical energy into other forms of energy?
a. Electrical power
b. Electric current
c. Resistance
d. Voltage
27. Which correctly expresses the relationship between voltage, current, and resistance?
a. V = I/R
b. V = IR
c. V = R/I
d. V = I + R
28. Which correctly expresses the relationship between voltage, current, and electrical power?
a. P = I + V
b. P = IV
c. P = I/V
d. P = V/I
29. An object with a positive charge
a. has lost some of its electrons
b. has gained some extra electrons
c. is attracted to a positively charged object
d. is repelled by a negatively charged object
30. Lightning is a(n)
a. electric resistance
b. electric circuit
c. electric discharge
d. potential difference
31. Electric current is
a. always stronger than static electricity
b. always increased when you increase the voltage
c. always decreased when you increase the voltage
d. the flow of electrons from one place to another
32. To find the potential difference in a system, you could
a. measure the amount of current
b. measure the amount of energy the electrons in a system have
c. subtract the current from the power
d. calculate the rate at which energy is delivered to the system
33. A substance that heats up as electric current flows through it
a. has low resistance
b. has high resistance
c. is a good insulator
d. is a good conductor
Underline the italicized word of phrase that best completes each statement
34. An object with a negative charge will attract/repel an object with a positive charge
35. A form of energy that build up on an object as it accepts or gives up electrons is electric
discharge/static electricity/direct current
36. According to the law of conservation of charge, electric charges exists in all matter in its
normal state/cannot be created or destroyed/is negative when an object gives away
electrons
37. After an electric discharge both objects are neutral/the discharged object has a positive
charge
38. A bolt of lightning illustrates electric discharge/potential difference/resistance
39. The material inside batteries is an electrolyte, a chemical that contains electric
energy/allows electric current to be conducted/emits light
40. Two quantities of electricity are measured: series and parallel/resistance and
discharge/ampere and volts
41. When alternating current is produced, flowing electrons repeatedly change direction/move
in one direction
42. As electric current passes through a light bulb, some energy is lost as heat and light/is
converted to chemicals
43. The difference between a dry cell and a wet cell is the type of electrolyte inside/the kind of
current/the potential difference
44. Potential difference measures the energy of electrons in a system in units called
watts/ohms/amperes/volts
45. Current, or the rate of flow of charge, is measured in units called watts/ohms/amperes/
volts
46. Power, of the rate at which electric energy is delivered, is measured in units called
watts/ohms/amperes/volts