Environmental Studies · Physics

Solar Radiation and Energy

926 Questions

Enhance your general science knowledge with these questions on solar radiation and energy. The topics span solar thermal power plants, photovoltaic devices, and the sun's energy output. This material is useful for environmental studies and physics.

Solar energy conversionSun luminosity and compositionAtmospheric reflectionSolar thermal technology

Solar Radiation and Energy Questions

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

Sun is the ultimate source of energy for the earth.

  1. True

  2. False

  3. Ambiguous

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

The sun is the ultimate source of almost all kinds of energy on earth,

either directly or indirectly.
Directly sun gives us solar power and is perfect non-conventional energy source.
Moreover, Fossil fuels (coal, oil and gas) are the

transformed forms of plants (and animals) which once lived on the earth

and grew capturing the energy of the sun. Biomass is a product of

photosynthesis where the sun has the major role. Hydro-electricity

depends upon the water cycle which again is dependent on solar

radiation. Similarly, wind energy, tidal power, wave power all, in some

way or other, and depend on the sun.

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

Geothermal energy can be best described as:

  1. light energy from Sun.

  2. heat energy from rocks inside Earth's surface.

  3. heat energy from temperature difference in tides.

  4. heat energy from combustion of minerals.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Geothermal energy is heat from within the Earth. The core and lower part of mantle generates large amount of heat. Deep, super heated water present, can be pumped to surface and used to produce electricity.

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 stefan's law black body radiation heat transfer thermal properties physics

The temperature of the sun is doubled, the rate of energy received on earth will be increased by a factor of :

  1. 2

  2. 4

  3. 8

  4. 16
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

We know that from Stefan's Boltzmann relation: $E\propto { T }^{ 4 }$
if the temperature of the sun will be doubled, then : $E\propto ({ 2T })^{ 4 }$
Hence, $E\  will\  increase \ by \ the \ factor \ of \  { 16}$.

Multiple choice stefan's law black body radiation heat transfer thermal properties physics

The Sun delivers ${{10}^{3}}W/{{m}^{2}}$ of electromagnetic flux to the Earth's surface.The total power that is incident on a roof of dimensions $8m\times 20m$, will be

  1. $6.4\times { 10 }^{ 3 }W$
  2. $3.4\times { 10 }^{ 4 }W$
  3. $1.6\times { 10 }^{ 5 }W$

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

Here the power per unit area is given, $I=10^3  W/m^2$

So, the total power $=I\times $ area of roof $=10^3\times (8\times 20)=1.6\times 10^5 W$ 

Multiple choice stefan's law black body radiation heat transfer thermal properties physics

Assertion (A): The radiation from the sun surface varies as the fourth power of its absolute temperature.
Reason (R): Sun is not a black body

  1. Both A and R are true, R is correct explanation of A

  2. Both A and R are true, R is not correct explanation of A

  3. A is true but R is false

  4. Both A and R are false
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

According to Stefan's law, energy emitted is proportional to fourth power of absolute temperature.
So, the same will hold for the sun.
Also, Sun can absorb/emit radiations of all wavelengths - so it is a black body.
So, assertion and reason are both correct.
But reason is not a correct explanation of assertion.
Because all bodies emit energy which is proportional to fourth power of absolute temperature, not only sun.

Multiple choice evs - i sources of water the lithosphere and the hydrosphere first aid safety and first aid

What is the origin of energy that drives the water cycle?

  1. Trees

  2. Water

  3. Mountains

  4. Sun
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • The hydrological cycle is a prominent method to rejuvenate the freshwater resources. 
  • It involves the evaporation of water into water vapor by the heat of the sun which further condenses into tiny water droplets that fall on the earth as rain.
  • This continuous recycling of water leads to the recharging of water resources. 
  • The solar radiation plays an important role in the water cycle.

    Hence, option D is correct.
Multiple choice physics electromagnetic waves properties and uses of different radiation electromagnetic spectrum spectrum

Name the radiation which can be detected by a thermophile.

  1. infrared radiation

  2. ultraviolet radiation

  3. X-rays

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A thermophile (or thermopile) is a device used to measure thermal radiation, which is primarily infrared radiation. It works by converting thermal energy into electrical energy.

Multiple choice physics electromagnetic waves properties and uses of different radiation electromagnetic spectrum spectrum

Les-energetic electromagnetic radiations like X-rays are generated in the

  1. Radiation zone

  2. Convection zone

  3. Photosphere

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

We know that radiation is emission or transmission of energy in the form of waves or particles.

$X$ rays make up $X$-radiation, a form of electromagnetic radiation.
That's why $X$ rays are generated in radiation zone.

Multiple choice

What is the primary source of solar energy?

  1. Nuclear Fusion

  2. Fossil Fuels

  3. Sunlight

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

Solar energy is derived from the sun's rays, which consist of electromagnetic radiation.