Tag: solar power plant
Questions Related to solar power plant
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.
The reflector on top of solar cooker is used to:
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diverge solar energy
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focus solar energy
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focus light energy
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reflect excess energy to surroundings
The reflector on the top of the solar cooker is used to focus the solar energy over the glass surface. The mirror reflects the heat energy in a confined area and increases the net input energy to the solar cooker.
The semiconductor panel on the front of a scientific calculator is
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Electric Cell
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Solar Cell
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Plane mirror
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Convex mirror
Solar cells are fitted on a scientific calculator.
Solar cell production is
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increasing slowly
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increasing exponentially
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constant
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decreasing
Production of solar cells is increasing exponentially every year.
What is the principle of working of solar cell
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photovoltaic effect
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green house effect
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Archimedes' principle
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Faraday's law
Solar cell works on the principle of photovoltaic effect according to which free electrons are produced when light of certain wavelength is incident on semiconductors.
The reflector on top of solar cooker is adjustable because of:
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revolution of Earth about Sun.
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rotation of Earth about Sun.
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atmospheric profile of gases.
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density variation in atmosphere.
Rotation of Earth about the Sun causes the position of Sun to change during the day. Hence, the mirror on the top of the solar cooker needs adjusting during the day to focus the rays in a small area.
A solar cooker works on:
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electrical energy
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magnetic energy
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solar energy
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chemical energy
Solar cooker is a device used to collect the solar energy in the form of heat.
Which of the following will improve the efficiency of a solar cooker?
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Regularly orienting the solar cooker according to the Sun.
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Increasing the span of glass sheet on the top.
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Using black coated utensils.
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All of the above.
To improve the efficiency of a solar cooker, the following steps need to be done: