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egee 101 exam 3 with complete solutions
A 9 volt battery draws 2 amps of current. How much power is produced? - ANSWER-18 watts Alternating current power is based on what physical concept? - ANSWER-The relationship between electricity and magnetism Can wind and solar power replace coal for US electric generation? - ANSWER- Yes, there is enough unused potential wind power to take over what coal is currently supplying Electricity demand is often highest at what time of day? - ANSWER-middle afternoon Electricity demand is often highest during which season? - ANSWER-summer he problem of needing to install large transmission capacity to move electrons from the power generation source to a market is called what? - ANSWER-location problem if a solar farm generates 10 MW in Arizona (320 sunny days per year) is moved to Pennsylvania (160 sunny days per year), what is the new power output? - ANSWER-5 MW
If a wind turbine extracted 100% of the kinetic energy out of the wind, what would happen? - ANSWER-the wind would stop blowing In an alternating current power system, if the current is increased while keeping power constant, what must happen to voltage? - ANSWER-voltage decreases layers of silicon that directly convert sunlight into an electric current are called what? - ANSWER-photovoltaic cells Nuclear power plants are designed to run 24 hours per day, 7 days per week. What kind of electricity do they provide? - ANSWER-base load nuclear weapons can be converted to nuclear reactors - ANSWER-true nuclear, wind, solar, and hydropower are all energy forms that do not directly emit carbon dioxide into the atmosphere - ANSWER-true nuclear, wind, solar, and hydropower are all renewable forms of energy - ANSWER-false panels that use sunlight to heat up water, spinning a turbine are called what? - ANSWER-concentrated solar the challenge associated with a renewable energy where excess power generation cannot be saved for later use - ANSWER-storage the challenge associated with wind energy that fluctuates throughout the day - ANSWER-intermittency the challenge associated with wind energy whose power output cannot be forecast in advance - ANSWER-predictability the Chernobyl accident was a nuclear explosion - ANSWER-false
Which energy Conversion do you think Solar photovoltaics take advantage of? - ANSWER-radiation to chemical to electric Which energy Conversion do you think Wind turbines take advantage of? - ANSWER-Potential to kinetic to electric Kinetic to kinetic to electric which energy sources typically don't fluctuate during power generation? - ANSWER-nuclear and hydro which is bigger? - ANSWER-The total global capacity of all renewable power plants (wind, solar, biomass, geothermal, hydroelectric) Which of the following describes the minute to minute variability of wind energy?
- ANSWER-turbulence Which of the following is not a challenge with wind and solar energy? - ANSWER- non-renewable Which of the following is not a challenge with wind and solar power? - ANSWER- non-renewable Which of the following probably produces alternating current electricity? - ANSWER-wind turbine gas turbine coal plants (anything with a turbine) Which of the following probably produces direct current electricity? - ANSWER- battery in phone solar panels Which of the following probably produces direct current? - ANSWER-solar photovoltaics
Which of the following strategies is used to smooth variability from wind and solar? - ANSWER-energy storage, interconnecting multiple wind and solar plants Which state uses the most solar energy? - ANSWER-california NC arizona Which state uses the most wind energy? - ANSWER-texas Iowa california Wind energy produced depends on which of the following factors: - ANSWER- turbine height, wind speeds, size of the blades wind is caused by uneven heating of the earth's surface - ANSWER-true Your typical AA battery produces 0.1 Amperes of current at 1.5 Volts. How much power (Watts) does the battery produce? - ANSWER-.15 watts
