Tag: renewable and non-renewable energy

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Questions Related to renewable and non-renewable energy

Multiple choice physics towards green energy non-conventional sources of energy electric energy generation and environment renewable and non-renewable energy

Solar energy can be used to produce

  1. Electrical energy

  2. Mechanical energy

  3. Heat energy

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Solar energy can be converted into electrical energy using photovoltaic cells, heat energy using solar thermal collectors, and mechanical energy through various solar-powered engines or systems.

Multiple choice physics towards green energy non-conventional sources of energy electric energy generation and environment renewable and non-renewable energy

Which of the following devices transforms light energy into chemical energy?

  1. Car dynamo

  2. Electric motor

  3. Electric fan

  4. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

None of the listed devices (car dynamo, electric motor, electric fan) transform light energy into chemical energy. Photosynthesis in plants is the primary natural process that performs this transformation.

Multiple choice physics towards green energy non-conventional sources of energy electric energy generation and environment renewable and non-renewable energy

Biomass based energy can be obtained from :

  1. direct burning of wood, agricultural residue etc.

  2. biomass may be converted in to some other form of fuel which can release energy.

  3. bacterial decomposition of organic matters like cow dung, agricultural wastes, human excreta etc. in presence of water in absence of air, a mixture of $CH _4, CO _2, H _2, H _2S $ etc.

  4. burning of industrial waste.
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Explanation

A biofuel is a fuel that is produced through contemporary biological processes, such as agriculture and anaerobic digestion, rather than a fuel produced by geological processes such as those involved in the formation of fossil fuels, such as coal and petroleum, from prehistoric biological matter. Biofuels can be derived directly from plants, or indirectly from agricultural, commercial, domestic, and/or industrial wastes. Renewable biofuels generally involve contemporary carbon fixation, such as those that occur in plants or microalgae through the process of photosynthesis. Other renewable biofuels are made through the use or conversion of biomass (referring to recently living organisms, most often referring to plants or plant-derived materials). This biomass can be converted to convenient energy-containing substances in three different ways: thermal conversion, chemical conversion, and biochemical conversion. This biomass conversion can result in fuel in solid, liquid, or gas form. This new biomass can also be used directly for biofuels.

Multiple choice physics towards green energy non-conventional sources of energy electric energy generation and environment renewable and non-renewable energy

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

  1. solar energy

  2. wind energy

  3. hydro energy

  4. tidal energy
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

Multiple choice physics towards green energy non-conventional sources of energy electric energy generation and environment renewable and non-renewable energy

The average annual wind density is $3\ kW/m^2/day$ along the coastal lines of Gujarat, western ghat and central parts of India which may show a seasonal variation (i.e., in winter it may go up to $10\ kW/m^2/day$ ). This can be harnessed as

  1. non-conventional energy

  2. coastal energy

  3. wind energy

  4. None of these
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Multiple choice physics towards green energy non-conventional sources of energy electric energy generation and environment renewable and non-renewable energy

The heat energy obtainable from hot rocks present inside the earth crust is termed as

  1. Nuclear energy

  2. Tidal energy

  3. Geothermal energy

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
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 radioactive decay of materials

Multiple choice physics towards green energy non-conventional sources of energy electric energy generation and environment renewable and non-renewable energy

Non-conventional forms of energy can be

  1. created.

  2. transduced from other forms of energy.

  3. exhausted in our lifetime.

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

Non-conventional energy sources, such as solar or wind, involve converting natural energy flows into usable forms like electricity. They are not created from nothing but are transduced from existing natural energy forms.

Multiple choice physics towards green energy non-conventional sources of energy electric energy generation and environment renewable and non-renewable energy

Which fuel has the highest energy content per unit of mass of any chemical fuel?

  1. Petrol

  2. Hydrogen

  3. Uranium

  4. Coal
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hydrogen fuel is a zero-emission fuel when burned with oxygen (if one considers water not as an emission) or used in a contained cell (allowing to react galvanically) also capable of 'reversing' the reaction if needed. It often uses electrochemical cells, or combustion in internal engines, to power vehicles and electric devices. It is also used in the propulsion of spacecraft and might potentially be mass-produced and commercialized for passenger vehicles and aircraft.