Sources of Energy Test

Result

Sources of Energy Test - 34

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Weekly Quiz Competition

Question 1
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Directions For Questions

Consider the following statements:
Statement 1: Sound is a form of energy.
Statement 2: Light is a form of energy.

...view full instructions

Which of the following is correct about the above statements?

A
Statement 1 is true and 2 is false

B
Statement 1 is false and 2 is true

C
Both 1 and 2 are true

D
Both 1 and 2 are false

E
None of these

Solution

A sound is a form of energy, just like electricity. A sound is made when air molecules vibrate and move in a pattern called waves, or sound waves. ... That action produces sound waves, which travel to your ears and then to your brain, which says, "I recognize that sound."

In fact, visible 'light' is a form of radiation, which can be defined as an energy that travels in the form of electromagnetic waves. It can also be described as a flow of particle-like 'wave-packets, called photons.
Question 2
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Of the following, renewable source of energy is

A
Wood

B
Petroleum

C
Natural gas

D
Uranium

Solution
Question 3
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Energy stored in fossil fuels is released by burning.

A
True

B
False

C
Ambiguous

D
Data Insufficient

Solution

Energy is stored in fossil fuels in form of chemical energy.And when these fuels are burned then a lot of heat energy is released .Hence above statement is true.
Question 4
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At many places in the ocean, the different in temperatures between the water 'at the surface of ocean' and 'at deeper levels' is up to

A
$$120^0C$$

B
$$80^0C$$

C
$$50^0C$$

D
$$20^0C$$

Solution
Question 5
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The dripstones are found in

A
glaciated regions

B
limestone caverns

C
desert regions

D
wave eroded areas
Question 6
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A typical solar cell generates 0.7W power. What is done to increase the power output of a solar panel?

A
Area of solar cells is increased

B
Power generated from solar panels cannot be increased

C
Solar cells are connected together to form solar panels

D
Thickness of solar cells is increased

Solution

A typical cell can produce about 0.7 W of electricity when exposed to the Sun. A large number of solar cells are, combined in an arrangement called a solar cell panel that can deliver enough electricity for practical use.
Question 7
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Which of the following is true about solar panels with respect to other sources of energy?

A
Solar cells have a high manufacturing cost and low efficiency

B
Solar cells have a low manufacturing cost and low efficiency

C
Solar cells have a low manufacturing cost and high efficiency

D
Solar cells have a low manufacturing cost and low efficiency

Solution

The manufacture of solar cells requires special grade silicon and silver which increases the manufacturing cost. Solar cells have a high manufacturing cost and low energy efficiency,
Question 8
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Which material is used for the interconnection of different solar cells to build a solar panel?

A
Copper

B
Silicon

C
Silver

D
Gold

Solution

Silver is used for the interconnection of the cells in the solar panel as it is a very good conductor of electricity.
Question 9
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Which of the following is true about solar cells?

A
It has low maintenance costs

B
It has high manufacturing costs

C
It has low efficiency

D
All of the above

Solution

Solar cells have high manufacturing cost because of the use of special grade silicon and silver in production. However, once set up, not much maintenance is requires as solar cells have no moving parts and they can be easily setup in remote areas. The efficiency of solar energy is quite low compared to other sources of energy.
Question 10
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The flowchart represents the energy transformation in a thermal power plant.
Identify A and B.

A
A: Mechanical Energy
B: Thermal Energy

B
A: Thermal Energy
B: Mechanical Energy

C
A: Thermal Energy
B: Chemical Energy

D
A: Chemical Energy
B: Thermal Energy

Solution

In thermal power plants, heat energy from steam is collected used to run a turbine and is converted to mechanical energy. This mechanical energy is then converted to electrical energy.

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Re-Attempt Weekly Quiz Competition

Sources of Energy Test - 34

Result

Sources of Energy Test - 34

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SHARING IS CARING

Question 1

Statement 1 is true and 2 is false

Statement 1 is false and 2 is true

Both 1 and 2 are true

Both 1 and 2 are false

None of these

Solution

Question 2

Wood

Petroleum

Natural gas

Uranium

Solution

Question 3

True

False

Ambiguous

Data Insufficient

Solution

Question 4

$$120^0C$$

$$80^0C$$

$$50^0C$$

$$20^0C$$

Solution

Question 5

glaciated regions

limestone caverns

desert regions

wave eroded areas

Question 6

Area of solar cells is increased

Power generated from solar panels cannot be increased

Solar cells are connected together to form solar panels

Thickness of solar cells is increased

Solution

Question 7

Solar cells have a high manufacturing cost and low efficiency

Solar cells have a low manufacturing cost and low efficiency

Solar cells have a low manufacturing cost and high efficiency

Solar cells have a low manufacturing cost and low efficiency

Solution

Question 8

Copper

Silicon

Silver

Gold

Solution

Question 9

It has low maintenance costs

It has high manufacturing costs

It has low efficiency

All of the above

Solution

Question 10

A: Mechanical EnergyB: Thermal Energy

A: Thermal EnergyB: Mechanical Energy

A: Thermal EnergyB: Chemical Energy

A: Chemical EnergyB: Thermal Energy

Solution

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A: Mechanical Energy
B: Thermal Energy

A: Thermal Energy
B: Mechanical Energy

A: Thermal Energy
B: Chemical Energy

A: Chemical Energy
B: Thermal Energy