Tag: production of electricity from solar energy

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Multiple choice physics world energy needs renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy

The superheated steam is raised in geothermal plants by the heat of :

  1. magma

  2. lava

  3. either (a) or (b)

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Answer is C.

The heat from the earth's core continuously flows outward. It transfers (conducts) to the surrounding layer of rock, the mantle. When temperatures and pressures become high enough, some mantle rock melts, becoming magma. Then, because it is lighter (less dense) than the surrounding rock, the magma rises, moving slowly up toward the earth's crust, carrying the heat from below.
Sometimes the hot magma reaches all the way to the surface, where we know it as lava. But most often the magma remains below earth's crust, heating nearby rock and water (rainwater that has seeped deep into the earth) - sometimes as hot as 700 degrees F. Some of this hot geothermal water travels back up through faults and cracks and reaches the earth's surface as hot springs or geysers, but most of it stays deep underground, trapped in cracks and porous rock. This natural collection of hot water is called a geothermal reservoir.
Hence, the super-heated steam is raised in geothermal plants by the heat of magma or lava.

Multiple choice physics world energy needs renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy

State True or False :
Geothermal energy can be used to produce electricity.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The steam comes from reservoirs of hot water found a few miles or more below the earth's surface. The steam rotates a turbine that activates a generator, which produces electricity Hence Geothermal energy can be used to produce electricity.

Multiple choice physics world energy needs renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy

Find the false statement from the following statements given below :-

  1. Geothermal power plants cannot operate round the clock.

  2. The initial cost in setting up Geothermal power plant will be high.

  3. Geothermal power plant uses free and renewable source of energy.

  4. Operating cost involved in a Geothermal power plant is less.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Geothermal power plants are actually known for their ability to operate continuously (base load power), unlike solar or wind, making the claim that they cannot operate round the clock false.

Multiple choice physics sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy substances, objects and energy production of electricity from solar energy

State whether given statement is True or False
In hydroelectric plants, the kinetic energy of flowing water drives the generator. 

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hydroelectric energy, also referred to as hydroelectricity or hydropower, is the use of moving water to produce electricity. This power is generated by converting the kinetic energy of flowing water into mechanical and then electrical energy. This process involves the use of turbines, which consist of a set of blades. The moving water flows over the blades, causing them to turn. The blades are connected to a rotating drive shaft. The mechanical energy of the drive shaft is transferred to a generator through a gearbox. The generator uses the mechanical energy of the drive shaft to move an electric conductor (typically coils of copper wire) through a magnetic field, which causes electrons to flow through the conductor, generating electricity. The electricity is then fed into the electrical grid to be used in homes, businesses, and by industry.
Hence, the statement is true.

Multiple choice evs solar energy renewable and non-renewable resources renewable and non-renewable sources of energy substances, objects and energy solar power plant production of electricity from solar energy solar energy and its applications

Coal and petroleum are called fossil fuels.      

  1. True

  2. False

  3. Ambiguous

  4. Data insufficient
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Answer is A.

It is because they are actually fossils. They are made of dead and decay matter buried under the earth for many years. The dead and decaying matter under great amount of pressure and temperatures turn into fossils and they both are used as fuels so it is called fossil fuels.
The fossil fuels we use today are actually formed from plants and animals that existed hundreds of millions of years ago. The reason there is a lot of concern surrounding the expenditure of these resources is because most of what we use today from fossil fuels, such as oil and coal are being depleted much faster than they can be formed, so there is a limited amount available.
Hence, the statement is true.

Multiple choice evs solar energy renewable and non-renewable resources renewable and non-renewable sources of energy substances, objects and energy solar power plant production of electricity from solar energy solar energy and its applications

The fossil fuels include:

  1. Uranium

  2. Soil

  3. Natural gas

  4. Plants
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fossil fuels are formed when plants and marine species are buried below ground and are subjected to immense pressure and temperature for thousands of years. Examples include coal, petroleum and natural gas.

Multiple choice physics energy management production of electricity from solar energy solar equipment solar power solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy

The energy which directly changes into electric energy in a solar cell is :

  1. heat energy only

  2. light energy only

  3. heat and light energy

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A solar cell gathers sunlight. It is the light energy which is converted into electrical energy.

Multiple choice physics solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

The group of solar cells connected in a specific pattern to produce desired magnitude of electric current is called :

  1. solar complex

  2. solar panel

  3. solar battery

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Solar panel refers either to a photovoltaic module, a solar hot water panel, or to a set of solar photovoltaic (PV) modules electrically connected and mounted on a supporting structure. A PV module is a packaged, connected assembly of solar cells. Solar panels can be used as a component of a larger photovoltaic system to generate and supply electricity in commercial and residential applications.