Sources of Energy Test

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Sources of Energy Test - 35

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Weekly Quiz Competition

Question 1
1 / -0

How much voltage and power does a typical solar cell generate?

A
10-50 V; 70 W

B
0.5–1 V; 70 W

C
10-50 V; 0.7 W

D
0.51 V; 0.7 W

Solution

A typical solar cell develops a voltage of 0.51 V and can produce about 0.7 W of electricity when exposed to the Sun.
Question 2
1 / -0

What is the value of solar constant?

A
$$1.4\ kJ.s^{-1}.m^{-2}$$

B
$$1.4\ W.m^{-2}$$

C
$$140\ kW.m^{-2}$$

D
$$14\ kJ.s^{-1}.m^{-2}$$

Solution

The solar constant is estimated to be approximately 1.4 kJ per second per square metre.
It denotes the rate at which energy reaches the unit area on earth's surface from the sun.
Question 3
1 / -0

Boojho lives in a small village in Himachal Pradesh, which is an inaccessible hamlet due to the mountainous terrain. Which energy source is suitable for his village?

A
Tidal energy

B
Thermal energy

C
Solar energy

D
Ocean thermal energy

Solution

Solar cells, which convert solar energy to electricity have no moving parts, require little maintenance, and can be set up in remote and inaccessible hamlets or very sparsely inhabited areas in which laying of a power transmission line may be expensive and not commercially viable. Hence solar energy is a viable option for Boojho's village.
Question 4
1 / -0

Artificial satellites and space probes use which of the following as a source of energy?

A
Leclanche cell

B
Dynamo

C
Electric generator

D
Solar cell

Solution

Artificial satellites and space probes like Mars orbiters use solar cells as the main source of energy.
Question 5
1 / -0

Thermal power plants are set up near_________.

A
Coal or oil fields

B
Rivers

C
Oceans

D
Wind turbines

Solution

In thermal power plants, large amounts of fossil fuels are burnt to boil water and generate steam. The transmission of electricity is more efficient than transporting coal or petroleum over the same distance. Therefore, many thermal power plants are set up near coal or oil fields to reduce the transportation costs of the fuel needed.
Question 6
1 / -0

Which is the most common source of electrical energy in India?

A
Thermal power plants

B
Hydro-electric power plants

C
Nuclear power plants

D
Solar or wind energy

Solution

In thermal power, fossil fuel is burnt to produce heat energy which is converted into electrical energy. Large amounts of fossil fuels are burnt every day in power stations to heat up water to produce steam which further runs the turbine to generate electricity. The thermal power plant is the most common source of electrical energy in India. The transmission of electricity is more efficient than transporting coal or petroleum over the same distance. Therefore, many thermal power plants are set up near coal or oil fields.
Question 7
1 / -0

The image represents a model to demonstrate conversion of thermal energy to electrical energy. Which device here transforms mechanical energy to electrical energy?

A
Tennis ball fitted with metal sheets

B
Dynamo

C
Bulb

D
Pressure cooker

Solution

Dynamo converts the mechanical energy (rotational energy of the tennis ball with blades) to electrical energy (supplied to the bulb).
Question 8
1 / -0

Which of the following sources of energy is used in our daily life?

A
Muscular Energy

B
Electrical Energy

C
Chemical Energy

D
All of the above

Solution

The muscular energy is used for carrying out physical work, electrical energy is used for running various appliances and chemical energy is used for cooking food or running a vehicle. Therefore, all the options given are used in our daily life.
Question 9
1 / -0

If you could use any source of energy for heating your food, which one would you choose among the following options based on the characteristics of good source of energy?

A
Coal

B
Wood

C
LPG

D
Fuel Oil

Solution

LPG - Liquefied Petroleum Gas
LPG would be preferred as it does not produce a huge amount of smoke on burning. It is easy to use and transport. It burns hotter, an advantage that can translate into higher efficiency.
Question 10
1 / -0

What is the daily average solar energy received by India under clear cloudless conditions?

A
$$4-7\ kWh/m^{-2}$$

B
$$1.4\ kWh/m^{-2}$$

C
$$45-100\ kWh/m^{-2}$$

D
$$100\ kWh/m^{-2}$$

Solution

Under clear (cloudless) sky conditions, the daily average sunlight received by India varies from $$4-7\ kWh/m^{-2}$$

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Re-Attempt Weekly Quiz Competition

Sources of Energy Test - 35

Result

Sources of Energy Test - 35

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SHARING IS CARING

Question 1

10-50 V; 70 W

0.5–1 V; 70 W

10-50 V; 0.7 W

0.51 V; 0.7 W

Solution

Question 2

$$1.4\ kJ.s^{-1}.m^{-2}$$

$$1.4\ W.m^{-2}$$

$$140\ kW.m^{-2}$$

$$14\ kJ.s^{-1}.m^{-2}$$

Solution

Question 3

Tidal energy

Thermal energy

Solar energy

Ocean thermal energy

Solution

Question 4

Leclanche cell

Dynamo

Electric generator

Solar cell

Solution

Question 5

Coal or oil fields

Rivers

Oceans

Wind turbines

Solution

Question 6

Thermal power plants

Hydro-electric power plants

Nuclear power plants

Solar or wind energy

Solution

Question 7

Tennis ball fitted with metal sheets

Dynamo

Bulb

Pressure cooker

Solution

Question 8

Muscular Energy

Electrical Energy

Chemical Energy

All of the above

Solution

Question 9

Coal

Wood

LPG

Fuel Oil

Solution

Question 10

$$4-7\ kWh/m^{-2}$$

$$1.4\ kWh/m^{-2}$$

$$45-100\ kWh/m^{-2}$$

$$100\ kWh/m^{-2}$$

Solution

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