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CBSE Questions for Class 10 Physics Sources Of Energy Quiz 9 - MCQExams.com
CBSE
Class 10 Physics
Sources Of Energy
Quiz 9
Which nuclear reaction takes place in an atom bomb?
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Nuclear fission
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Nuclear fusion
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Radioactivity
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Combustion
Explanation
In an atom bomb, nuclear fission reaction takes place. In this type of reaction, the nucleus of an atom splits into two or more smaller nuclei. One reaction induces a series of chain reactions and a very large amount of energy is released in this process.
Bio-mass is a __________ source of energy.
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Renewable
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Non-Renewable
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Both
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None
Explanation
Bio-mass is plant and animal material used as fuel. Therefore, bio-mass is a renewable source of energy.
The oil supplies of the United States are subject to.
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constant increase
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environmental depletion
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price stability
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none of the above
When a log of wood burns, it converts _____
energy to heat energy.
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Chemical
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Mechanical
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Electrical
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Nuclear
Electric heater converts:
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Heat energy into electrical energy
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Chemical energy into electrical energy
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Electrical energy into Heat energy
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Electrical energy into Chemical energy
Explanation
The energy supplied to the circuit by the source gets dissipated in the resistor as heat. The electric heater is based on the heating effect of current. Electric heater converts electrical energy into heat energy.
Which of the following is correct about the above statements?
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Statement 1 is true and 2 is false
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Statement 1 is false and 2 is true
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Both 1 and 2 are true
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Both 1 and 2 are false
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None of these
Explanation
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.
Of the following, renewable source of energy is
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Wood
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Petroleum
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Natural gas
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Uranium
Energy stored in fossil fuels is released by
burning.
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True
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False
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Ambiguous
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Data Insufficient
Explanation
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.
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
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$$120^0C$$
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$$80^0C$$
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$$50^0C$$
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$$20^0C$$
The dripstones are found in
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glaciated regions
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limestone caverns
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desert regions
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wave eroded areas
A typical solar cell generates 0.7W power. What is done to increase the power output of a solar panel?
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Area of solar cells is increased
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Power generated from solar panels cannot be increased
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Solar cells are connected together to form solar panels
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Thickness of solar cells is increased
Explanation
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.
Which of the following is true about solar panels with respect to other sources of energy?
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Solar cells have a high manufacturing cost and low efficiency
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Solar cells have a low manufacturing cost and low efficiency
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Solar cells have a low manufacturing cost and high efficiency
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Solar cells have a low manufacturing cost and low efficiency
Explanation
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,
Which material is used for the interconnection of different solar cells to build a solar panel?
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Copper
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Silicon
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Silver
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Gold
Explanation
Silver is used for the interconnection of the cells in the solar panel as it is a very good conductor of electricity.
Which of the following is true about solar cells?
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It has low maintenance costs
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It has high manufacturing costs
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It has low efficiency
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All of the above
Explanation
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.
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?
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Tidal energy
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Thermal energy
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Solar energy
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Ocean thermal energy
Explanation
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.
Artificial satellites and space probes use which of the following as a source of energy?
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Leclanche cell
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Dynamo
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Electric generator
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Solar cell
Explanation
Artificial satellites and space probes like Mars orbiters use solar cells as the main source of energy.
Thermal power plants are set up near_________.
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Coal or oil fields
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Rivers
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Oceans
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Wind turbines
Explanation
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.
Which is the most common source of electrical energy in India?
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Thermal power plants
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Hydro-electric power plants
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Nuclear power plants
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Solar or wind energy
Explanation
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.
The image represents a model to demonstrate conversion of thermal energy to electrical energy. Which device here transforms mechanical energy to electrical energy?
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Tennis ball fitted with metal sheets
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Dynamo
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Bulb
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Pressure cooker
Explanation
Dynamo converts the mechanical energy (rotational energy of the tennis ball with blades) to electrical energy (supplied to the bulb).
Which of the following sources of energy is used in our daily life?
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Muscular Energy
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Electrical Energy
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Chemical Energy
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All of the above
Explanation
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.
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?
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Coal
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Wood
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LPG
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Fuel Oil
Explanation
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.
Two statements are given :
Energy can neither be created nor be destroyed. It can only be converted from one form to another form.
Energy is consumed while doing work by a source of energy and can't be used again.
Which option justifies the above statements?
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First statement is wrong.
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Second statement is wrong.
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Energy consumed while doing work can always be reused.
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The usable form of energy is dissipated to the surroundings in less usable forms.
Explanation
Both the statements are given are correct. Energy consumed while doing work can't be used again because energy has been converted from one form to another form that is less usable.
For example: Suppose we heat a cup of water and let it cool. There is no way to collect all the heat lost to the environment and make the water hot once it has cooled down.
Why do we prefer petroleum over coal? Select appropriate options.
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Easy to transport
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Less pollution
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Difficult to transport
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Economical
Explanation
Petroleum is preferred over coal for the following reasons -
Easy to transport
Less pollution
Economical
Which among the following is not a renewable source of energy?
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Solar Energy
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Natural Gas
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Biomass
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Wind Energy
Explanation
Solar energy, biomass and wind energy are renewable sources of energy.
Natural gas is a non-renewable source of energy.
What is the daily average solar energy received by India under clear cloudless conditions?
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$$4-7\ kWh/m^{-2}$$
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$$1.4\ kWh/m^{-2}$$
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$$45-100\ kWh/m^{-2}$$
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$$100\ kWh/m^{-2}$$
Explanation
Under clear (cloudless) sky conditions, the daily average sunlight received by India varies from $$4-7\ kWh/m^{-2}$$
In thermal power plants, turbines are run by:
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pressurized steam
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water
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wind
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chemical reactions
Explanation
Traditional thermal power plants: also called combustion power plants, they operate with energy produced by a steam boiler fueled by coal, natural gas, heating oil, as well as by biomass. The steam is under pressure and with this pressure it activates a turbine which, in turn, drives a generator to produce electricity.
Select all appropriate options.
"Good fuel is - "
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Readily available
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Easy to store and transport
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Expensive
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Burn easily in air
Explanation
Good fuel is -
readily available
easy to store and transport
low cost
burn easily in air
Acid rain happens because
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The sun leads to the heating of upper layer of the atmosphere.
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Burning of fossil fuels releases oxides of carbon, nitrogen and sulphur in the atmosphere.
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Due to friction among clouds.
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Earth atmosphere contains different types of acids.
Explanation
The oxides of carbon, nitrogen and sulphur that are released on burning fossil fuels are acidic oxides. During rain these oxides in atmosphere after mixing with water lead to acid rain which affects our water and soil resources.
Those sources of energy which have been accumulated in nature over a long time is known as ________________.
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Time Energy
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Conventional Source of Energy
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Mechanical Energy
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Non-Conventional Source of Energy
Explanation
Those sources of energy which have been accumulated in nature over a long time is known as Conventional sources of energy. They are non-renewable sources of energy. They can not be replenished quickly , they take millions of years to form.
Ex: Fossil fuels such as coal, petroleum and natural gas.
Increasing industrialization has led to a better quality of life all over the world. It has also caused the global demand for energy to grow at a tremendous rate. The growing demand for energy was largely met by ______________.
Select all appropriate options.
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Coal
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Petroleum
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Fossil fuels
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Bio mass
Explanation
The growing demand for energy was largely met by the fossil fuels coal and petroleum.
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