What is biomass? What can be done to obtain bio-energy using biomass?
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1
|
2458
|
April 4, 2019
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(i) What is biogas? Name two main combustible components of biogas?
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1
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1351
|
April 4, 2019
|
(a) Name the device used to convert: 1. Solar energy into heat
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1
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546
|
April 4, 2019
|
Compare and contrast bio-mass and hydro-electricity as source of energy
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1
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733
|
April 4, 2019
|
1. What is a ‘solar cell’?
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1
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590
|
April 4, 2019
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1. State one limitation of solar energy available from solar cells
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1
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773
|
April 4, 2019
|
(a) Why is the solar cooker box covered with a plane glass plate?
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1
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819
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April 4, 2019
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What kind of mirror concave, convex or plane would be best suited for the use in a solar cooker? Why?
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1
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814
|
April 4, 2019
|
What is biogas? How can biogas be obtained?
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1
|
1685
|
April 4, 2019
|
What is meant by the calorific value of a fuel? How is it determined?
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1
|
578
|
April 4, 2019
|
Name three forms in which energy from oceans is made available for use. What are OTEC power plants?
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1
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1007
|
April 4, 2019
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Suggest two ways to reduce energy consumption
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1
|
721
|
April 4, 2019
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What is geothermal energy? Write its advantage
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1
|
616
|
April 4, 2019
|
What steps would you suggest to minimise environmental pollution caused by burning of fossil fuels?
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1
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1487
|
April 4, 2019
|
What are fossil fuels? Write two disadvantages of buring fossil fuels
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1
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463
|
April 4, 2019
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How is charcoal obtained from wood? Why is charcoal considered as a better fuel than wood?
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1
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1453
|
April 4, 2019
|
What is biogas? Why is biogas considered as ah ideal fuel for domestic use?
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1
|
2325
|
April 4, 2019
|
(a) Distinguish between renewable and non-renewable sources of energy
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1
|
724
|
April 4, 2019
|
Discuss one limitation each for the extracting of energy from: (a) wind. (b) tide
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1
|
755
|
April 4, 2019
|
List any four characteristics of bio gas on account of which it is considered as an ideal fuel
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1
|
1480
|
April 4, 2019
|
What is the use of the black painted surface in solar heating devices?
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0
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1834
|
March 16, 2018
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Give an example of indirect harnessing of solar energy
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0
|
1817
|
March 16, 2018
|
State the important uses of wind energy
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0
|
877
|
March 16, 2018
|
Write two advantages of classifying energy sources as renewable and non- renewable
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0
|
3756
|
March 16, 2018
|
Why is tidal energy not likely to be a potential source of energy?
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0
|
1082
|
March 16, 2018
|
Why is it not possible to make use of solar cells to meet all our energy needs?
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0
|
4474
|
March 16, 2018
|
How is nuclear energy generated during nuclear fusion?
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0
|
1519
|
March 16, 2018
|
Firewood is a conventional fuel
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0
|
765
|
March 16, 2018
|
State two advantages and two disadvantages of geothermal energy
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0
|
841
|
March 16, 2018
|
What is biogas?
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|
0
|
6090
|
March 16, 2018
|