Georgia Science Grade 8

Chapter 20: 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)140 V
B)143 V
C)120 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)147 V
B)145 V
C)140 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)150 V
B)112 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)140 V
B)143 V
C)162 V
D)122 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)92 ohms
B)69 ohms
C)79 ohms
D)55 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)55 ohms
B)69 ohms
C)60 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)100 ohms
B)88 ohms
C)97 ohms
D)92 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)55 ohms
B)42 ohms
C)60 ohms
D)72 ohms
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