A Good Source of Energy

Q.

State any four characteristics of a good source of energy.

Q.

What are the qualities of an ideal source of energy?

Q.

What is the ideal source of energy?

Q. The disadvantages of a steam engine are

1. very bulky
2. less efficient
3. cheap
4. takes a long time

Q.

What are the advantages of using solar cells for producing electricity?

Q.

Describe a solar cell. Name the elements which can be used to fabricate a solar cell.

Q.

Name a device used to convert solar energy to heat and solar energy into electricity.

Explain the principle of working of a windmill.

Q. Which of the following are the limitations of the steam engine?

1. Construction of steam engine is complex.
2. Steam engine is bulky, hence cannot be used to run small machines.
3. The engine can't start instantly.
4. Steam engine is small in size.

Q. Write four characteristics of the good source of energy.

Q. Why is the energy of flowing river water considered to be an indirect form of solar energy?

Q.

Which energy of solar radiation is used for generating electricity with the help of solar cells?

Q.

Explain the principle of the working of a solar cell made of a semiconductor. Why are solar cell panels used in an artificial satellite?

Q.

Mention three advantages of a solar cell panel.

Q. What are the characteristics of good sources of energy?

Q.

Which of the following is not the quality of an ideal source of energy?

1. Easy to spend on burning

2. Able to produce huge amount of heat and energy on burning

3. Economical

4. Smoke/pollution free

Q. What are the uses of Hydrogen as a fuel?

1. Liquid hydrogen is used in spaceships as fuel
2. Oxy-hydrogen flames are used for cutting and welding of metals
3. Can be used in cars as fuel
4. Used in electrolysis of water
5. a, b and c are correct

Q.

Why is it very expensive to use solar cells?

Q.

Which renewable energy is used by a windmill?

Q.

Why are Hydrogen engines a bad idea?

Q.

Give reasons for:

a) Charcoal is a better fuel in comparison to wood.

b) Bio- gas is considered an ideal fuel.

c) What does OTEC stand for.

Q.

which of the following is non renewable source of energy

1. Wind energy

2. Solar energy

3. Hydro energy

4. Natural gas

Q. What are the qualities of an ideal source of ​ energy?

Q.

If you are stuck in a forest which source of energy will you consider to be efficient and why?

1. wood

2. wind energy

3. nuclear energy

4. coal

Q. Which of the following are characteristics of a good source of energy?

1. It can provide an adequate amount of useful energy at a steady rate over a long period of time.
2. It should be safe and convenient to use.
3. It should be economical.
4. All of the above.

Q.

What are solar cell panel? Mention a few of its application.

Q. Which of these are the characteristics of a good source of energy?

1. Should store large amount of energy per unit mass.
2. Extraction of energy should be economical.
3. Should be accessible and easy to transport.
4. Should generate smoke during combustion.

Q. In terms of the least polluting source of energy, is an ideal fuel.

1. hydrogen
2. coal
3. crude oil
4. LPG

Q.

Why is wind energy pollution-free?

Q. Which of the following can be considered as fuel?

1. LPG
2. Natural gas
3. Coal
4. Oil
5. Cement
6. Plastic
7. Soil
8. Hydrogen

Q. What is calorific value? What are non-renewable sources?