Electric Energy and Power

What will be the current drawn by an electric bulb of 1000 W when it is connected to a source of 220 V?

• 4.55 A

• 28800 J or 28.8 KJ

• 80 W

• 200 W

How is electrical energy generated in a nuclear power plant?

• The uranium is heated, which heats the air. The hot air rises and turns the electric generator’s turbine.

• The energy/heat generated from bombarding uranium with neutrons boils water into steam, which turns a turbine, thus running the electric generator.

• The uranium is superheated and vaporized. The radioactive waste is distilled and powers the electric generator.

• The turbine breaks down the uranium into neutrons that powers the electric generator, thus producing an electric current.

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NGSS.HS-PS1-8

Coal is burned to heat water so that the _______ can turn turbines.

• Fire

• Steam

• Gorillas

• Wind

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Uranium atoms are split to create a tremendous amount of heat in a _____ power plant.

• Biomass

• Geothermal

• Nuclear

• Hydro-electric

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Which alternative energy resource can be found on the roof tops of houses or buildings?

• Water

• Wind

• Solar

• Geothermal

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Electric generators work by

• converts mechanical energy to electrical energy (electricity)

• converting oil into electricity

• turning fossil fuels into uranium

• rubbing copper against a substance does not conduct electricity

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Which of the following best describes disadvantages of solar panels?

• they can provide a lot of power and only need a small amount of land.

• they can be used practically anywhere and are easy to make.

• they cannot provide energy at night and building many solar panels can be an expensive investment.

• None of the above.

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Hydropower creates energy from

• The sun

• falling water

• steam

• organic matter

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What is the formula for calculating electric power in a circuit?

Which of the following devices is used to measure electric power in a circuit?

• Voltmeter

• Ammeter

• Wattmeter

• Ohmmeter