12th Grade > Physics
WORK POWER AND ENERGY MCQs
Work And Energy, Sources Of Energy, Electric Potential Energy Potential And Dipoles
Total Questions : 109
| Page 8 of 11 pages
Answer: Option C. -> uranium
:
C
Uranium is the primary element in nuclear reactors as it is capable of generating alarge amount of energy by the process of nuclear fission.
:
C
Uranium is the primary element in nuclear reactors as it is capable of generating alarge amount of energy by the process of nuclear fission.
Answer: Option D. -> fossil fuel
:
D
In a thermal power station, fuel like coal, naphtha, lignite, etc., are ignited. The heat energy liberated is used to convert water into steam at high pressure and temperature. Hence, thermal power plants use fossil fuels.The energy of the steam is used to rotatethe turbine to generate electricity.
The energy changes taking place here is:
Chemical energy -> Heat energy -> Mechanical energy -> Electrical energy.
:
D
In a thermal power station, fuel like coal, naphtha, lignite, etc., are ignited. The heat energy liberated is used to convert water into steam at high pressure and temperature. Hence, thermal power plants use fossil fuels.The energy of the steam is used to rotatethe turbine to generate electricity.
The energy changes taking place here is:
Chemical energy -> Heat energy -> Mechanical energy -> Electrical energy.
Answer: Option C. -> depends on wind velocity.
:
C
The wind makes the rotor spin.As the rotor spins,the spinningof the bladesgives power to a generator which produces electricity. So more the velocity of the wind, more will the blades spin and more will be the power generated.
The motion of the windturning theturbine is called kinetic energy of the wind.This energyis converted into electricity.
:
C
The wind makes the rotor spin.As the rotor spins,the spinningof the bladesgives power to a generator which produces electricity. So more the velocity of the wind, more will the blades spin and more will be the power generated.
The motion of the windturning theturbine is called kinetic energy of the wind.This energyis converted into electricity.
Answer: Option C. -> Immobile and localized.
:
C
An ideal source of energy should possess the following characteristics.
(a) It should be capable of giving an adequate amount of useful energy.
(b) It should be convenient to transport, store and use.
(c) It should be economical.
(d) It should be capable of supplying the desired quantity of energy at a steady rate over a long period of timeand it should be pollution free.
:
C
An ideal source of energy should possess the following characteristics.
(a) It should be capable of giving an adequate amount of useful energy.
(b) It should be convenient to transport, store and use.
(c) It should be economical.
(d) It should be capable of supplying the desired quantity of energy at a steady rate over a long period of timeand it should be pollution free.
Answer: Option D. -> All of these
:
D
Solar cells are used in traffic signals,calculators and artificial satellite.Assemblies of photovoltaic cells are used to make solar modules which generate electrical power from sunlight.
:
D
Solar cells are used in traffic signals,calculators and artificial satellite.Assemblies of photovoltaic cells are used to make solar modules which generate electrical power from sunlight.
Answer: Option C. -> Fossil fuel
:
C
Fossil fuels come from the very old life forms that have decomposed over a long period of time under the earth's crust. Fossil fuelis a general term for the buried combustible deposits,formedfrom the decomposition of organic matter (such as plants and animals) when subjected to high heat and pressure in the earth's crust overhundreds of millions of years.The three most important fossil fuels arecoal,petroleum or crude oil, andnatural gas.
:
C
Fossil fuels come from the very old life forms that have decomposed over a long period of time under the earth's crust. Fossil fuelis a general term for the buried combustible deposits,formedfrom the decomposition of organic matter (such as plants and animals) when subjected to high heat and pressure in the earth's crust overhundreds of millions of years.The three most important fossil fuels arecoal,petroleum or crude oil, andnatural gas.
Answer: Option B. -> 1, 2 and 3
:
B
Tidal energy uses the difference in sea level between high tides and low tides to produce energy. Wave energy uses the kinetic energy of the wave to produce energy. Ocean thermal energy uses the temperature difference between top surface and water at depth to evaporate ammonia, which is further used to run the turbine.
:
B
Tidal energy uses the difference in sea level between high tides and low tides to produce energy. Wave energy uses the kinetic energy of the wave to produce energy. Ocean thermal energy uses the temperature difference between top surface and water at depth to evaporate ammonia, which is further used to run the turbine.
Answer: Option C. -> the atmosphere of the sun
:
C
Nuclear fusionis a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles (neutrons or protons). Nuclear fusion occurs in sun. As a result, the sun forms this immense source of energy.
:
C
Nuclear fusionis a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles (neutrons or protons). Nuclear fusion occurs in sun. As a result, the sun forms this immense source of energy.
Answer: Option C. -> It causes rehabilitation of people.
:
C
Advantages of hydel power generation are:
Pollution is rarely created.
Reduces greenhouse emissions.
Relatively low maintenance costs.
It is renewable.
Hydel power plantscoverlarge area and hence rehabilitation of people is done.
:
C
Advantages of hydel power generation are:
Pollution is rarely created.
Reduces greenhouse emissions.
Relatively low maintenance costs.
It is renewable.
Hydel power plantscoverlarge area and hence rehabilitation of people is done.
Answer: Option B. -> Gobar is the major constituent of the slurry which is used in the production of bio-gas.
:
B
A slurry of cow dung and water is made in the mixing tank from where it is fed into the digester. As the starting material is cow dung, hence the name gobar gas.
:
B
A slurry of cow dung and water is made in the mixing tank from where it is fed into the digester. As the starting material is cow dung, hence the name gobar gas.
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