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Kinjal ray
Kinjal ray
@kinjal-ray
Noble Member
Joined: Nov 6, 2020
Last seen: Sep 30, 2021
Topics: 0 / Replies: 2124
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Answer to: What is the meaning for gobar?

Gobar means animal dung in Hindi.

5 years ago
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Answer to: Draw the two common designs of solar cookers.

Box type solar heater and Spherical type solar heater.

5 years ago
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Answer to: (a) What is a solar water heater? (b) Mention one advantage and one disadvantage of harnessing solar energy.

(a) A Solar Water Heater (SWH) is a device that uses solar energy to heat water. (b) Solar Water Heater have several advantages over conventional wa...

5 years ago
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Answer to: Explain wind power, the principle behind wind mill and its uses.

Wind power is the conversion of wind energy into more useful forms, usually electricity using wind turbines. In 2005, worldwide capacity of wind-power...

5 years ago
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Answer to: Write two limitations of wind mill.

An estimated 1% to 3% of energy from the Sun that hits the earth is converted into wind energy. This is about 50 to 100 times more energy than is conv...

5 years ago
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Answer to: What is the main basic cause for winds to blow? Compare wind power and power of water flow in respect of generating mechanical and electrical energies.

The main basic cause for the winds to blow is the difference in temperature of the atmosphere, which makes the air to get high dense and low dense and...

5 years ago
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Answer to: Define solar constant.

The amount of solar energy form the sun which incident on the earth per square metre is called solar constant.

5 years ago
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Answer to: What are the advantages of using solar water heater? Draw a labeled schematic diagram for a solar water heater.

A Solar Water Heater (SWH) is a device that uses solar energy to heat water. Solar Water Heater have several advantages over conventional water heatin...

5 years ago
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Answer to: A student constructed a box type solar cooker. He found that it is not working efficiently. What could this be due to? Give any four possible mistakes that he could have made?

The transparency of the glass plate must be checked. The reflectance of the mirror is to be checked. The black coating must be coated effectively....

5 years ago
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Answer to: Give the limitations in using commercially wood as fuel, over windmills.

Basic commercial fuel used is wood, because of its abundance in existence. Another fact is it is non-renewable but windmill energy is a renewable sour...

5 years ago
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Answer to: Why are solar cells not used effectively?

High expensive, not re-usable. Hence it is not used effectively.

5 years ago
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Answer to: Give the purpose of mirror and glass sheet in solar cooker.

In solar cooker glass sheet acts as a transparent medium which allows light into the medium. Mirror reflects the light which emerges from the cooker. ...

5 years ago
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5 years ago
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