# Introduction To Physical Science

## 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