Tag: generation of electricity
Questions Related to generation of electricity
Why are a large number of solar cells are joined in a solar panel?
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To reduce cost of production.
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To get more electricity.
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Its a tradition.
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None of the above.
Solar panel uses multiple solar cells to increase electricity produced by the system.
How is more electricity production achieved with solar cell?
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Joining many solar cells.
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Decreasing the surface area of solar cell.
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Rotating solar cell in random directions.
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Removing clouds.
Solar panel uses multiple cells to add up electricity output from the system.
Which of the following devices convert solar energy to electricity
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Solar Cooker
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Solar Cell
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LED
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Pressure cooker
Solar cell converts light energy of sun into electrical energy.
Which of the following uses solar cells?
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Natural satellites
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Water dams
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Artificial satellites
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Motor vehicle
Solar cells have access only to the solar energy and chemical energy (battery embedded in satellite system). However, chemical energy is limited. Hence, solar energy is the standard source of energy used in satellites.
What is a group of solar cells called?
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Solar cluster
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Solar panel
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Solar powerhouse
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Solar group
Group of solar cells is called solar panel.
Why do solar cells have a great future?
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They provide a clean source of energy.
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Supply of energy from sun is unlimited.
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The cost of conventional sources of energy is rising while cost of solar cells is reducing.
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All of the above.
Solar cell produces pure electricity with no waste products and is environment friendly.
Which of the following materials play a key role in the functioning of a solar cell
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Silicon
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Glass
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Plastic
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All of the above
When light energy is incident on Si, it is converted to electricity by the principle of photovoltaic effect. GaAs, InP are other materials with similar property.
The cost of solar cells is
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decreasing exponentially
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decreasing slowly
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constant
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increasing
The cost of solar cells is reducing exponentially.
The use of solar energy on large scale becomes harder because:
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Its installation cost is often more than conventional systems.
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Storing of large amounts of D.C. is not easy.
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It requires a huge area of exposure to sunlight to gather substantial energy.
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All of the above.
Solar energy production on a large scale is difficult on a large scale because:
Solar cooker is painted black from inside so that:
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Less heat is lost
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Less heat is radiated
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More heat is amplified
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More heat is trapped
Black surfaces are good absorbers and good radiators of heat and hence painting the surface black traps more heat and improves the efficiency of solar cooker.