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3 cards from this section. Quick, good the night before a test.
What is the relationship between energy consumption and power rating for appliances?
Consider what happens when you use more powerful appliances.
What does energy efficiency in household appliances mean?
Think about how LED bulbs use less energy than incandescent bulbs.
What is power in the context of electrical energy?
Remember the definition of power and its relation to work.
True or False: High-voltage transmission increases energy loss in cables.
Think about the relationship between voltage and current.
A city uses a 100-mile, 6-inch diameter power line with an average current of 1000 A. Calculate the energy loss if the resistance is 0.1 ohms per mile.
Use the total resistance to find the energy loss from the current.
If a household replaced all its incandescent bulbs with LED bulbs that use 75% less energy, how would this affect their electricity bill over a year assuming they use them for 5 hours daily?
Compare the kWh used throughout the year between both types.
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