Glencoe Physical Science with Earth Science

Chapter 13: Electricity

Math Practice

1
A lightbulb is plugged in a 110-V wall outlet. How much electric power does the lightbulb use if the current in the bulb is 0.5 A?
A)66 W
B)62 W
C)50 W
D)55 W
2
A lightbulb is plugged in a 110-V wall outlet. How much electric power does the lightbulb use if the current in the bulb is 0.6 A?
A)66 W
B)62 W
C)55 W
D)72 W
3
A lightbulb is plugged in a 110-V wall outlet. How much electric power does the lightbulb use if the current in the bulb is 0.65 A?
A)71.5 W
B)62.3 W
C)55.5 W
D)74.3 W
4
A toaster is plugged in a 110-V wall outlet. How much electric power does the lightbulb use if the current in the bulb is 10.9 A?
A)1,000 W
B)1,300 W
C)1,199 W
D)1,500 W
5
What is the current in a toaster if the toaster uses 1,500 W of power when plugged into a 110-V wall outlet?
A)12.0 A
B)13.6 A
C)14.2 A
D)15.0 A
6
What is the current in a toaster if the toaster uses 2,000 W of power when plugged into a 110-V wall outlet?
A)17.0 W
B)16.5 A
C)19.2 A
D)18.2 A
7
What is the voltage in a dryer if the dryer uses 5,000 W of power when plugged into a 20.0-A wall outlet?
A)220 V
B)200 V
C)180 V
D)250 V
8
What is the voltage in a dryer if the dryer uses 4,200 W of power when plugged into a 22.0-A wall outlet?
A)186 V
B)180 V
C)200 V
D)191 V
9
What is the current in a dryer if the dryer uses 5,500 W of power when plugged into a 220-V wall outlet?
A)25 A
B)22 A
C)27 A
D)29 A
10
What is the current in a dryer if the dryer uses 5,940 W of power when plugged into a 220-V wall outlet?
A)22 A
B)27 A
C)29 A
D)32 A
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