EASY
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In compressed air energy storage technology air is compressed and stored.

50% studentsanswered this correctly

Important Questions on Energy

EASY
Physics>Change>Energy>Hydroelectricity

What are the limitations in harnessing wind energy?

MEDIUM
Physics>Change>Energy>Hydroelectricity

Correct statement, if it is wrong.

India is called the 'country of winds'.

EASY
Physics>Change>Energy>Hydroelectricity
The largest source of power supply in India is
EASY
Physics>Change>Energy>Hydroelectricity

Write down the two benefits of use of solar energy.

MEDIUM
Physics>Change>Energy>Hydroelectricity
_____ (windmill/ thread mill) is used to draw water from tube wells.
MEDIUM
Physics>Change>Energy>Hydroelectricity
How do windmills work?
EASY
Physics>Change>Energy>Hydroelectricity
Define Tides.
HARD
Physics>Change>Energy>Hydroelectricity
Compare and contrast fossil fuels and the Sun as a direct source of energy.  
EASY
Physics>Change>Energy>Hydroelectricity
What does a windmill do?
EASY
Physics>Change>Energy>Hydroelectricity

Give your opinion about whether hydroelectric plants are environment friendly or not?


MEDIUM
Physics>Change>Energy>Hydroelectricity

What are the uses of these fans?

Question Image   

EASY
Physics>Change>Energy>Hydroelectricity

Write the quadrants in which the following points lie:

-4,7

HARD
Physics>Change>Energy>Hydroelectricity
State the changes in the form of energy while producing hydroelectricity.
EASY
Physics>Change>Energy>Hydroelectricity
Every day, the rotation of the earth causes one high tide and one low tide. 
HARD
Physics>Change>Energy>Hydroelectricity
One million cubic meters of water is stored in a reservoir feeding a water turbine. The density of water is 993 kg/m³. If the centre of mass of water is 50 meters above the turbine and losses are negligible, the energy produced by that volume of water is _____.
EASY
Physics>Change>Energy>Hydroelectricity

Question Image

How are chillies dried? 

EASY
Physics>Change>Energy>Hydroelectricity

What is meant by green energy? Which energy sources can be called as green energy sources and why? Give examples.


MEDIUM
Physics>Change>Energy>Hydroelectricity
Correct the following statement by changing one word in the sentence.
Wind mills are used to generate wind.
MEDIUM
Physics>Change>Energy>Hydroelectricity
How can we use air to make electricity?
MEDIUM
Physics>Change>Energy>Hydroelectricity
What is meant by ‘high tide’?