Electricity Use in Homes and Businesses

Question 1

Which of these sources are used to generate electrical energy in power plants? Check all that apply.coalnatural gasbiodieselnuclear reactionswindbatterieswater

Revolt · Accepted Answer

coal; natural gas; nuclear reactions; wind; water

Question 2

Consider two lightbulbs that exhibit 1600 lumens.

Revolt · Accepted Answer

The efficacy of a 100 W incandescent lightbulb is lm/W.: 16; What is the power of a CFL lightbulb if its efficacy is 67 lm/W? W.: 24

Question 3

0.04233✔ 2489

Revolt · Accepted Answer

✔ 24

Question 4

Which device increases or decreases voltage as electricity is transmitted from power plants to homes and businesses?

Revolt · Accepted Answer

transformer

Question 5

How much energy does an electric hair dryer use if it draws 8.3 amps of current when using 120 volts for 5.0 minutes?

Revolt · Accepted Answer

0.083 kWh

Question 6

It takes about four minutes to bake a potato in a 1000 W microwave oven. How much energy is used?

Revolt · Accepted Answer

0.07 kWh

Question 7

Consider two lightbulbs that exhibit 1600 lumens.

Revolt · Accepted Answer

✔ 16; The efficacy of a 100 W incandescent lightbulb is lm/W.: 16; What is the power of a CFL lightbulb if its efficacy is 67 lm/W? W.: 24

Electricity Use in Homes and Businesses Answers

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