Gizmo Warm-up The Household Energy Usage Gizmo™ allows you to compare the energy used by different...

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Gizmo Warm-up  The Household Energy Usage Gizmo™ allows you to compare the energy used by different appliances in the home. On the BEDROOM tab, click the printer XXXXXXXXXXVoltage (V) is a measure of how much electrical energy is in a circuit. Most household circuits operate at 120 volts (120 V).    Is this true of the printer? ___________________ XXXXXXXXXXCurrent (I) is a measure of the amount of electrical charge that passes through the circuit each second. Current is measured in amperes (A).    How much current does the printer use? ________________________________ XXXXXXXXXXWattage (W) is the energy that is used by a device each second. It is equal to current multiplied by voltage (W = I × V). Wattage is measured in watts (W) or kilowatts (kW).
	
Document Preview: GENERAL PHYSICAL SCIENCELAB – ELECTRICITYOBJECTIVESStudents will…Learn how to calculate energy consumption based on wattage and usage.Compare the efficiency of three types of light bulbs.Estimate the daily, monthly, and yearly cost of electricity for a household.Explore ways that energy can be conserved effectively.MATERIALSInternet accessVocabularyCurrent – the flow of electrical charge.In a metal wire, current is the flow of negatively charged particles (electrons).Current is measured in amperes (A).In equations, the symbol for current is I.Energy consumption – the amount of energy that is used.The unit of energy consumption used in this Gizmo™ is the kilowatt-hour, or kWh. A 60-watt light bulb consumes 0.06 kilowatt-hours of energy in one hour.To calculate energy consumption, multiply wattage by usage.Fluorescent lamp – a light source that consists of a glass tube coated with phosphor and filled with argon and another inert gas.When an electric current flows through a fluorescent lamp, the gases emit ultraviolet radiation. This radiation excites the phosphors, which then emit light.Halogen lamp – a type of incandescent lamp in which the tungsten filament is encased in a capsule containing a mixture of gases that allow it to operate at a high temperature. Incandescent lamp – a standard light bulb. An electrical current passes through a thin tungsten filament, causing it to glow and give off light.The tungsten filament produces a lot of heat as well as light. Because of this, incandescent lamps are less efficient than fluorescent lamps.Lumen – a measure of the light produced by a lamp.A lumen is equal to the amount of light produced by a single candle.A standard 60-watt incandescent bulb produces about 800 lumens of light.Usage – the amount of time an electrical device is used.Voltage – a measure of electrical potential energy.Just as pressure causes water to flow through a pipe, voltage can be thought of as “electrical...

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11/8/2017 Household Energy Usage Gizmo : ExploreLearning
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1. A power drill runs at a voltage of 120 V and draws a current of 4 A. What is the wattage of the drill?
 A. 4 W
 B. 120 W
 C. 124 W
 D. 480 W
Correct Answer: D. 480 W 
Explanation: Wattage is calculated by multiplying the voltage of the device by the current it draws. 
   wattage = voltage • current 
   wattage = (120 V) • (4 A) 
   wattage = 480 W
You answered this question correctly!
2. If it takes 15 minutes to dry your hair with a 1.200 kW hair drier, how much energy is used in drying your hair?
 A. 0.300 kWh
 B. 1.200 kWh
 C. 1.800 kWh
 D. 18.000 kWh
Correct Answer: A. 0.300 kWh 
Explanation: The amount of energy consumed is equal to the wattage of the device multiplied by the amount of time that the device runs.

Gizmo Warm-up The Household Energy Usage Gizmo™ allows you to compare the energy used by different appliances in the home. On the BEDROOM tab, click the printer XXXXXXXXXXVoltage (V) is a measure of...

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