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Physical Science Electricly Magnetiam Electrical Power and Energy What is the equation for POWER used by an electrical appliance What is the equation for electrical ENERGY used by an appliance Name Part A Use the power equation to solve for current voltage or power used by each appliance 1 05 amperes of current go through a cordless curting iron powered by a 9 voll battery How much power is used by the curling iron 2 A 110 velt wall outlet supplies power to a strobe light The current flowing through the light is 0 05 amperes How much power is used by the strobe light 3 ACD player has a current of 0 1 amps flowing through it If the CD player uses 0 4 watts of power what is the voltage of the CD player s battery 4 A television is plugged into a 120 volt wall outlet It uses 360 watts of power What current flows through the television Part B Use the electrical energy equation to calculate the power length of time or electrical energy used by each appliance 5 A hair dryer is used for 7 5 hours one month It uses 600 watts of power on average How much electrical energy does the hair dryer use in a month How much would it cost to use the hair dryer each month if the rate charged by the electric company is 0 09 per kWh Physical Science Name 6 A stereo is used for 90 hours per month It costs 0 88 to run the stereo each month If the electric company charges 0 09 per kWh what electric energy is used by the stereo What power is used 7 A color television uses 15 0 kWh of electric energy each month If the television uses 200 watts of power each month how many hours does it run 8 A laptop is used for 3 hours a day If the voltage of the laptop battery is 19 5 volts and the current is 4 62 amps what electric energy does the laptop use each day Part C Find the power or energy used by each appliance You may have to use ohm s law to find the current or voltage first 9 A remote control is powered by two 1 5 volt batteries If the resistance is 6 ohms find the current flowing through the remote control and then find the power used by the remote control 10 If the remote control in the above problem is used for a total of 3 5 hours how much electrical energy does it use 11 A camera has a resistance of 3 ohms A current of 1 ampere flows through the camera when it is in use Solve for the voltage of the battery in the camera and then find the power used by the camera 12 Find the electrical energy used by the camera in the above problem if the camera Runs for 150 minutes

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