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Sources of Energy : Complete Set Question


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This set of questions contains all the possible concepts
which could be asked in the examination

Sources of Energy

INTRODUCTION

Q.1 What is energy crisis?

An energy crisis occurs when we all have a great need of fuel or electricity but does not have enough amounts of them. For example, a large portion of the energy we use is derived from oil. Some experts claim that we will run out of oil in just a few decades


Q.2 Why energy crisis occurs?

When we use energy in its usable form like in cooking, we convert the form of energy and get our work done during the process. Since we cannot reverse the change involved in this process so we cannot get back the original usable form of energy. Due to this, it becomes important to think about energy shortage and the related energy crisis.       


Q.3  List the characteristics of good sources of energy?

Or

What are the qualities of an ideal source of energy?

• It should give large amount of energy per unit mass.

• It should be easy to access.

• It should be easy to store and transport.

• It should be cheap


Q.4  What is a good source of energy?

A good source of energy is the one with following properties:

• It should give large amount of energy per unit mass.

• It should be easy to access.

• It should be easy to store and transport.

• It should be cheap


Q.5  What is a good fuel?

A good fuel is the one with following properties:

• Good fuel should give more heat.

• Should release less smoke.

• Should be cheap.

• Should be easily available.

• Safe

• Should be easy to store.

• Less ash should be left.

• Should have proper burning temperature.


Q.6 The use of dry wood as domestic fuel is not considered as good. State two reasons for it?

The two reasons for dry wood not being a good option for domestic use are:

• It gives very small amount of energy

• It produces lots of smoke.


Q.7 State three criteria for considering charcoal a better fuel than wood for domestic purposes?

The three essential properties for charcoal being a better fuel than wood for domestic use:

• No flame when charcoal is burnt.

• Charcoal produces more energy.

• Charcoal releases less smoke.


Q.8 What do you mean by renewable energy?

Renewable sources of energy are the source which can last for a very long time. It’s supply is unlimited. They are also called non - exhaustible sources of energy. Examples of such type of energy resources are sun, wind, wood and wave etc.


Q.9 What do you mean by non-renewable energy?

Non-renewable sources of energy are sources whose supply is limited and is likely to be finished one day. They are also called exhaustible sources of energy. Examples of such type of energy resources are coal, petrol etc.


Q.10 List two uses of energy in our daily life?

Two uses of energy in daily life is:

• Cooking

• Running Automobiles



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