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प्रश्न
Distinguish between the following.
Electricity generation from solar cells and solar thermal power generation
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उत्तर
| Electricity generation from solar cells | Solar thermal power generation | |
| i. | Solar radiation energy is converted directly into electrical energy. | The energy in solar radiation is first converted into thermal energy and then converted to electrical energy through various stages. |
| ii. | The electrical energy is generated directly by the photovoltaic effect. | The electrical energy is generated using reflectors, condenser, cooling tower, turbine and generator. |
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संबंधित प्रश्न
What type of reactions occurring inside the sun produce solar energy?
What is the range of temperature which can be achieved in a box-type solar cooker in two to three hours?
Write the uses of solar cells.
If the energy received by 5 m2 area in 10 minutes is 4200 kJ, calculate the value of solar constant.
With the help of a labelled diagram, explain the construction and working of a solar cooker.
Why is the solar cooker box painted black from inside?
If the solar constant is 1.4 kW/m2 then solar energy recived by 1m2area in one hour is:
(a) 5040 J
(b) 504.0 kJ
(c) 5040 kJ
(d) 5.04 kJ
Solar cells are used to provide the electric current to charge the batteries of a car driven by an electric motor. Describe the energy changes which take place.
What differences would you expect in the charging of car batteries (i) in bright sunlight (ii) on a cloudy day (iii) at night?
What steps would you suggest to reduce energy consumption?
Which of the following is used in solar cooker to harvest the solar energy?
a) Solar panels
b) Silicon cell
c) Mirrors
d) Glass lid
Draw neat and labelled diagram.
One solar panel produces a potential difference of 18 V and current of 3 A. Describe how you can obtain a potential difference of 72 Volts and current of 9 A with a solar array using solar panels. You can use sign of a battery for a solar panel.
Re-write the statement by selecting the appropriate option.
The solar lamp uses the ................... energy.
State the importance of inverters.
Give scientific reason.
Hydropower, solar energy and wind energy are called renewable energy.
What is the disadvantage of solar energy?
How can solar energy be harnessed? Mention any two limitations in using solar energy. How are these limitations overcome?
