Sources of Energy Test

Result

Sources of Energy Test - 30

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Weekly Quiz Competition

Question 1
1 / -0

Photovoltaic cells use _______ to produce electricity.

A
water stored by a dam

B
heat energy of coal or petroleum

C
wind energy

D
solar energy

Solution
Question 2
1 / -0

In a windmill:

A
the translational motion of the windmill is used to turn the turbine of the electric generator.

B
the rotatory motion of the windmill is used to turn the turbine of the electric generator.

C
the upward motion of wind is the primary source of energy.

D
slow winds are more efficient for energy production.

Solution

Wind turbines operate on a simple principle. The energy in the wind turns two or three propeller-like blades around a rotor. The rotor is connected to the main shaft, which spins a generator to create electricity.
Question 3
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Which of the following are disadvantages of hydro power plant?

A
Dams can be constructed only in a limited number of places.

B
Large areas of agricultural land and human habitation are sacrificed

C
Methane is released contributing to green house effect

D
All of above

Solution

In hydro electric plants:
1. Dams are constructed in hilly areas, hence only a limited number of places.
2. Large areas of agricultural land and human habitation are sacrificed as they get submerged.
3. The vegetation which is submerged rots under anaerobic conditions and methane is released contributing to green house effect.
Question 4
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An atom bomb works on :

A
Electrical energy

B
Heat energy

C
Mechanical energy

D
Atomic energy

Solution

Atomic energy
Atomic energy is the energy that is created by splitting apart the nuclei of atoms. The atomic energy is released during the process of nuclear fission.
The basic principle of atom bomb is uncontrolled nuclear fission.

Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei with release of lot of energy.
Question 5
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Why are a large number of solar cells are joined in a solar panel?

A
To reduce cost of production.

B
To get more electricity.

C
Its a tradition.

D
None of the above.

Solution

Solar panel uses multiple solar cells connected in series to increase electricity produced by the system.In series connection total electricity produced by all solar cells increases.
Question 6
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When compared to other kinds of energy-providing fuels like petrol, wood and nuclear reactors, hydro-electricity is better. Because it

A
Causes minimum pollution

B
Is renewable

C
Is safe

D
All of these

Solution

Energy produced by combusting wood, petrol or through via nuclear reactors causes serious pollution which is harmful for the ecology.
Whereas, hydroelectricity causes much less pollution. It is also a renewable source of energy, as the process of generating electricity relies on water cycle. It is is a safe option to produce energy.
Hence, option D is correct.
Question 7
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Categorized them as conventional and un non-conventional source of energy Petrol, wind energy, coal, diesel, solar energy, tidal energy, hydroelectricity

A
Conventional: Wind energy, solar energy, tidal energy

Non-conventional: Petrol, diesel, coal, hydroeletricity

B
Conventional: Wind energy, solar energy, tidal energy, hydroelectricity

Non-conventional: Petrol, diesel, coal

C
Conventional: Petrol, diesel, coal, hydroelectricity

Non-conventional: Wind energy, solar energy, tidal energy

D
Conventional: Petrol, diesel, coal

Non-conventional: Wind energy, solar energy, tidal energy, hydroelectricity

E
None of these

Solution

The energy which are non-renewable is knows as conventional source of energy. (e.g. coal, petrol diesel)
The energy which are renewable is known as non-conventional source of energy. (e.g. wind energy, solar energy, tidal energy, hydro electricity)
Question 8
1 / -0

Increasing the surface area of a solar cell

A
increases the current and the power output.

B
increases the voltage and the power output.

C
decreases the current output but increases the power output.

D
has no effect.

Solution

Output of solar cell occurs at a constant voltage. Using a group of solar cells in the solar panel increases the amount of current produced. Also, as area is increased more solar energy is captured and more electrical energy is produced.
Question 9
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Wave energy harness :

A
Winds produced by huge waves.

B
Waves formed by tides.

C
Potential energy of normal waves.

D
Kinetic energy possessed by huge waves.

Solution

Similarly, the kinetic energy possessed by huge waves near the sea- shore can be trapped in a similar manner to generate electricity. The waves are generated by strong winds blowing across the sea. Wave energy would be a viable proposition only where waves are very strong.
Question 10
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Ocean thermal energy is a useful source of energy when the temperature difference between surface and depth of 2km is:

A
Less than $$10^\circ C$$

B
More than $$10^\circ C$$

C
Less than $$20^\circ C$$

D
More than $$20^\circ C$$

Solution

Ocean thermal energy conversion plants can operate if the temperature difference between the water at the surface and water at depths up to 2 km is $$20^\circ C$$ or more.

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Sources of Energy Test - 30

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Sources of Energy Test - 30

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SHARING IS CARING

Question 1

water stored by a dam

heat energy of coal or petroleum

wind energy

solar energy

Solution

Question 2

the translational motion of the windmill is used to turn the turbine of the electric generator.

the rotatory motion of the windmill is used to turn the turbine of the electric generator.

the upward motion of wind is the primary source of energy.

slow winds are more efficient for energy production.

Solution

Question 3

Dams can be constructed only in a limited number of places.

Large areas of agricultural land and human habitation are sacrificed

Methane is released contributing to green house effect

All of above

Solution

Question 4

Electrical energy

Heat energy

Mechanical energy

Atomic energy

Solution

Question 5

To reduce cost of production.

To get more electricity.

Its a tradition.

None of the above.

Solution

Question 6

Causes minimum pollution

Is renewable

Is safe

All of these

Solution

Question 7

Conventional: Wind energy, solar energy, tidal energyNon-conventional: Petrol, diesel, coal, hydroeletricity

Conventional: Wind energy, solar energy, tidal energy, hydroelectricityNon-conventional: Petrol, diesel, coal

Conventional: Petrol, diesel, coal, hydroelectricityNon-conventional: Wind energy, solar energy, tidal energy

Conventional: Petrol, diesel, coalNon-conventional: Wind energy, solar energy, tidal energy, hydroelectricity

None of these

Solution

Question 8

increases the current and the power output.

increases the voltage and the power output.

decreases the current output but increases the power output.

has no effect.

Solution

Question 9

Winds produced by huge waves.

Waves formed by tides.

Potential energy of normal waves.

Kinetic energy possessed by huge waves.

Solution

Question 10

Less than $$10^\circ C$$

More than $$10^\circ C$$

Less than $$20^\circ C$$

More than $$20^\circ C$$

Solution

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Conventional: Wind energy, solar energy, tidal energy

Non-conventional: Petrol, diesel, coal, hydroeletricity

Conventional: Wind energy, solar energy, tidal energy, hydroelectricity

Non-conventional: Petrol, diesel, coal

Conventional: Petrol, diesel, coal, hydroelectricity

Non-conventional: Wind energy, solar energy, tidal energy

Conventional: Petrol, diesel, coal

Non-conventional: Wind energy, solar energy, tidal energy, hydroelectricity