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CBSE Questions for Class 10 Physics Sources Of Energy Quiz 8 - MCQExams.com
CBSE
Class 10 Physics
Sources Of Energy
Quiz 8
State whether the given statement is True or False :
Solar panel can be set up in remote and inaccessible hamlets or very sparsely inhabited areas.
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True
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False
Which of the following is not a consequence of exploiting the sources of energy?
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Air pollution.
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Depletion of natural resources.
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Purification of atmosphere.
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Global warming.
Explanation
Exploiting any source of energy disturbs the environment in some way or the other. Choice of the source of energy depends on the cost, the efficiency of the source, and its environmental consequences. It is a fact that air pollution, depletion of natural resources, and global warming are direct consequences of the exploitation of sources of energy.
So, purification of the atmosphere is not possible by exploiting sources of energy.
Which of the following is not a source of bio-fuel?
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bio-ethanol
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bio-diesel
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bio-petrol
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animal fats/oils
Explanation
Biofuels are the fuels that are derived from the biomass like plant, algae material or animal waste. Bio-ethanol, bio-diesel, animal fats/oils are biofuels. But bio-petrol is not a bio-fuel.
Energy can be extracted by creating a reservoir or basin behind a barrage and then passing tidal waters through turbines in the barrage to generate electricity. This form of energy is known as
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Solar energy
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Wind energy
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Hydro energy
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Tidal energy
Explanation
Tidal power, also called tidal energy, is a form of hydropower that converts the energy obtained from tides into useful forms of power, mainly electricity.
Which of the following is not a feature of bio energy?
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It improves soil quality
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It enhances water retention
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It reduces carbon dioxide content in the atmosphere
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It increases pollution
Explanation
Bioenergy refers to electricity and gas that is generated from organic matter, known as biomass. It is a biodegradable form of energy hence it never increases pollution.
Option "D" is correct.
The installed capacity of wind energy in India is about:
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$$8000 MW$$
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$$4000 MW$$
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$$6000 MW$$
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$$1500 MW$$
Explanation
Wind power generation capacity in India has significantly increased in the last few years .
The installed capacity of wind energy in India is about 8000MV.
The largest installation of wind turbines in our country is in:
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Ladakh
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Gujarat
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Kanyakumari
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Madhya Pradesh
Explanation
The largest wind energy farm has been established near Kanyakumari in Tamil Nadu and it generates $$380 \ MW$$ of electricity.
So option C is the answer.
The heat energy obtainable from hot rocks present inside the earth crust is termed as
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Nuclear energy
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Tidal energy
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Geothermal energy
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None of these
Explanation
Geothermal energy is thermal energy generated and stored in the Earth. Thermal energy is the energy that determines the temperature of matter. The geothermal energy of the Earth's crust originates from the original formation of the planet and from the radioactive decay of materials
Which of the following is a source of renewable energy?
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0%
0%
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None of these
Explanation
Wind energy, solar energy, geothermal energy are the example of renewable energy because we can reuse these energies
Non-conventional sources of energy are
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pollution-free
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renewable
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inexhaustible
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exhaustible
Explanation
Natural resources like wind, tides, solar, biomass, etc generate energy
which is known as "Non-conventional
resources“. These are pollution free ,renewable,inexhaustible and hence we can use these to produce a clean form of energy
without any wastage.
State whether true or false :
Solar Energy doesn't cause any pollution.
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True
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False
Explanation
Solar energy systems/power
plants do
not produce air pollution
, water pollution
, or greenhouse gases.
State whether true or false :
While making food through solar cooker, vitamins of food get destroyed.
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True
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False
Explanation
when the food is cooked in solar cooker using natural heat coming from direct sun light, most of the nutrients remain intact. So the given statement is false.
Which of the following statements is not correct regarding the geothermal energy?
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Geothermal energy is most versatile
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The source of energy is free and renewable
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Electricity can be generated round the clock
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Electricity produced is not cheap
Explanation
Since geothermal energy is naturally occurring thermal energy formed within rocks, and heat is continuously formed inside rocks, it's a free and renewable and most versatile source of energy. And since it's always available electricity can be produced round the clock and cheaply.
In hydrogen bomb we use the process of
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Fusion
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Fission
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Both (1) & (2)
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None of these
Explanation
The hydrogen bomb relies on fusion, the process of taking two separate atoms and putting them together to form a third atom.
Fusion is the process that powers the sun and the stars. It is the reaction in which two atoms of hydrogen combine together, or fuse, to form an atom of helium. In the process some of the mass of the hydrogen is converted into energy
Hence,
option $$A$$ is correct answer.
Which source of energy makes use of the air pressure in generation of energy ?
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Hydroelectric Power plant
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Nuclear reactor
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Windmill
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Thermal power plant
Explanation
Windmill makes use of the air pressure in the generation of energy, as hydroelectric power plants capture the energy of falling water to generate electricity.
A nuclear reactor produces electricity by chain reaction produces the energy, which turns water into steam. The pressure of the steam turns a generator, which produces electricity.
In a thermal power plant fuel is burned to produce heat, this heat is used to change water into steam. this drives the generator to produce electricity.
Whereas in a windmill 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.
We can also prepare food on a cloudy day through a solar cooker.
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True
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False
Explanation
A solar cooker is an apparatus that is used to cook food using direct sunlight. No, on a cloudy day solar cooker did not get a sufficient amount of sunlight to produce heat energy for cooking.
Which of the following is a renewable source of energy
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Wood
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Petrol
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LPG
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None of these
Which one among the following is a sea without having a coastline?
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North sea
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Sargasso sea
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Baltic sea
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Bering sea
Explanation
While all other seas in the world are defined at least in part by land boundaries, the Sargasso Sea is defined only by ocean currents. It does not have any coastline.
What is the correct sequence from the smallest to the largest grain of the following types of clastic rocks?
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Shale, sandstone, conglomerate, siltstone
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Shale, siltstone, sandstone, conglomerate
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Conglomerate, sandstone, shale, siltstone
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Sandstone, siltstone, conglomerate, shale
The riverbank is weakest where the river turns.This is because water
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gets concentrated on the inner bank of the turn, making it denser
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effectively bounces off the outer bank as it turns exerting an extra pressure on the bank
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flows faster as it turns
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reacts more effectively with the bank at a turn
Explanation
The riverbank is weakest where the river turns because water
effectively bounces off the outer bank as it turns, exerting an extra pressure on the bank.
Minimum velocity of wind required for a functional windmill is about:
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15 km /h
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15 m/s
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30 m/s
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Any velocity will do
Explanation
The kinetic energy of wind is utilized to generate electricity. In this, the wind energy is used to move the turbine of a windmill at high speed which generates electricity. So, the minimum speed required to move the fans of the windmill is 15 km/hr.
How much voltage and power does a typical solar cell generate?
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10-50 V; 70 W
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0.5–1 V; 70 W
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10-50 V; 0.7 W
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0.51 V; 0.7 W
Explanation
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.
The temperature difference required up to a water level difference of $$1000 \,m$$ for operating an OTEC system is:
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$$20^o C$$
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$$15^o C$$
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$$25^o C$$
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$$10^o C$$
Explanation
Water present at the surface of sea is continuously being heated due to sunlight but. the water present in the deep-sea level is quite cold because sunlight is unable to penetrate deep into the water. So. this difference in the different levels of water in the sea can be utilised efficiently to create electricity. A plant where electricity is created from this source is called as OTEC-ocean thermal energy conversion plant. The minimum temperature difference required for an OTEC to function is $$20^o C$$.
Solar energy has the greatest potential of all the renewable sources of energies.
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True
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False
Explanation
Solar energy is a renewable energy in true senses. We can never ever face any shortage of solar energy. Solar energy will be available till the date of existence of sun which is expected to be $$5$$ more billion years.
Spherical reflectors are used satellite dish.
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True
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False
Explanation
Concave reflectors are used in a satellite dish as it helps to converge all the signals to a focal point where the receiver is kept.
Ocean thermal energy is due to:
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Energy stored by waves in the ocean
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Temperature difference at different levels in the ocean
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Pressure difference at different levels in the ocean
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Tides arising out in the ocean
Explanation
The water at the surface of the sea or ocean is heated by the Sun while the water in deeper sections is relatively cold. This difference in temperature is exploited to obtain energy in ocean-thermal-energy conversion plants. These plants can operate if the temperature difference between the water at the surface and water at depths up to $$2\ km$$ is $$20\ K (20^\circ \ C)$$ or more. The warm surface-water is used to boil a volatile liquid like ammonia. The vapours of the liquid are then used to run the turbine of generator. The cold water from the depth of the ocean is pumped up and condense vapour again to liquid.
Choose the incorrect statement
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We are encouraged to plant more trees so as to ensure a clean environment and also provide bio-mass fuel
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Gobar-gas is produced when crops, vegetable wastes, etc., decompose in the absence of oxygen.
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The Main Ingredient of bio-gas is ethane and it gives a lot of smoke and also produces a lot of residual ash
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Bio-mass is a renewable source of energy
Explanation
The main ingredient of biogas is ethane and it gives a lot of smoke and also produces a lot of residual ash. Biomass is a renewable source of energy. The main ingredient of biogas is methane (up to $$75\ %$$) and it burns without smoke and leaves no ash.
What type of energy is used to run submarine?
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Wind energy
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Ocean energy
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Atomic energy
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None of these
Explanation
Atomic energy is used to run submarine. Atomic energy comes from nuclear reactors that use nuclear fission.
Which method is used to produce electricity in hydro electric power plant?
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By boiling the water to produce steam
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By ionizing water
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By running dynamo the kinetic energy of water
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By running dynamo the potential energy of water
Explanation
By running dynamo, the kinetic energy of water is used to produce electricity in hydro electric power plant.
Which method is used to produce electricity in thermal power plant?
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By heating chargeable cells
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By boiling water to produce steam
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By pushing pistons by heat energy
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Any of the above
Explanation
In thermal Power Plant, a large amount 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 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. The term thermal power plant is used since fuel is burnt to produce heat energy which is converted into electrical energy.
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