Indiana Science Grade 8

Chapter 10: Electricity

Solving a Simple Equation

1.
A lightbulb is plugged into a wall outlet. If the lightbulb has a resistance of 200 ohms and the current of the lightbulb is 0.6 A, what is the voltage provided by the outlet?
A)143 V
B)120 V
C)140 V
D)125 V
2.
A lightbulb is plugged into a wall outlet. If the lightbulb has a resistance of 210 ohms and the current of the lightbulb is 0.7 A, what is the voltage provided by the outlet?
A)140 V
B)145 V
C)147 V
D)136 V
3.
A lightbulb is plugged into a wall outlet. If the lightbulb has a resistance of 190 ohms and the current of the lightbulb is 0.6 A, what is the voltage provided by the outlet?
A)122 V
B)142 V
C)140 V
D)114 V
4.
An electric iron plugged into a wall socket has a resistance of 28 ohms. If the current in the iron is 4.0 A, what is the voltage provided by the wall socket?
A)130 V
B)116 V
C)112 V
D)135 V
5.
An electric iron plugged into a wall socket has a resistance of 30 ohms. If the current in the iron is 5.0 A, what is the voltage provided by the wall socket?
A)112 V
B)150 V
C)119 V
D)124 V
6.
An electric iron plugged into a wall socket has a resistance of 26 ohms. If the current in the iron is 5.5 A, what is the voltage provided by the wall socket?
A)122 V
B)140 V
C)162 V
D)143 V
7.
What is the resistance of a lightbulb connected to a 110-V wall outlet if the current in the lightbulb is 1.4 A?
A)55 ohms
B)69 ohms
C)92 ohms
D)79 ohms
8.
What is the resistance of a lightbulb connected to a 110-V wall outlet if the current in the lightbulb is 1.6 A?
A)60 ohms
B)55 ohms
C)69 ohms
D)72 ohms
9.
What is the resistance of a lightbulb connected to a 110-V wall outlet if the current in the lightbulb is 1.2 A?
A)92 ohms
B)88 ohms
C)97 ohms
D)100 ohms
10.
What is the resistance of a lightbulb connected to a 110-V wall outlet if the current in the lightbulb is 2.0 A?
A)42 ohms
B)55 ohms
C)60 ohms
D)72 ohms
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