# Glencoe Science Level Blue

## Chapter 22: Electricity

### Solving a Simple Equation

 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) 62 W B) 66 W C) 55 W D) 50 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) 72 W B) 62 W C) 55 W D) 66 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) 1000 W B) 1200 W C) 1300 W D) 1500 W 5 What is the current in a toaster if the toaster uses 1500 W of power when plugged into a 110-V wall outlet? A) 14.2 A B) 12.0 A C) 13.6 A D) 15.0 A 6 What is the current in a toaster if the toaster uses 2000 W of power when plugged into a 110-V wall outlet? A) 19.2 A B) 17.0 W C) 16.5 A D) 18.2 A 7 What is the voltage in a dryer if the dryer uses 5000 W of power when plugged into a 20.0-A wall outlet? A) 250 V B) 220 V C) 200 V D) 180 V 8 What is the voltage in a dryer if the dryer uses 4200 W of power when plugged into a 22.0-A wall outlet? A) 186 V B) 191 V C) 180 V D) 200 V 9 What is the current in a dryer if the dryer uses 5600 W of power when plugged into a 220-V wall outlet? A) 27 A B) 22 A C) 25 A D) 29 A 10 What is the current in a dryer if the dryer uses 6000 W of power when plugged into a 220-V wall outlet? A) 27 A B) 22 A C) 29 A D) 32 A