Environmental Studies · Physics

Solar Radiation and Energy

876 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 gravitation: planets and satellites weightlessness application of newton's law of motion escape velocity

Motion of artificial satellite around the earth is powered by :

  1. Liquid fuel

  2. Solar energy

  3. Atomic energy

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

Answer is D.

The orbit of an artificial earth satellite is an ellipse whose focus is at the center of the earth (in a particular case, a circle) and which maintains an unchanged position in space. Movement along such an orbit is called undisturbed motion and proceeds on the assumption that the earth attracts, according to Newtons law, like a sphere with spherical density distribution and that the satellite is affected only by the earths gravitational attraction.
Such factors as atmospheric drag, compression of the earth, solar radiation pressure, and the attraction of the moon and sun are the reasons for deviations from undisturbed motion. Because of atmospheric drag, satellites in orbits at altitudes of several hundred kilometers gradually descend and, entering the dense layers of the atmosphere at an altitude of 120130 km and lower, disintegrate and burn up; thus, they exist for a limited period.
Hence, the motion of artificial satellite around the earth is NOT powered by any of the options given.

Multiple choice evs - i substances, objects and energy renewable resources alternative fuels and energy sources alternative sources of energy conservation of fossil fuels

A solar cell converts:

  1. heat energy into electrical energy

  2. solar energy into electrical energy

  3. heat energy into light energy

  4. solar energy into light energy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Solar-powered photovoltaic (PV) panels convert the sun's rays into electricity by exciting electrons in silicon cells using the photons of light from the sun. This electricity can then be used to supply renewable energy to your home or business. Light striking a silicon semiconductor causes electrons to flow, creating electricity. Solar power generating systems take advantage of this property to convert sunlight directly into electrical energy. 

Multiple choice evs - i substances, objects and energy renewable resources alternative fuels and energy sources alternative sources of energy conservation of fossil fuels

Plants store solar energy in the form of:

  1. electric energy

  2. thermal energy

  3. chemical energy

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

Plants trap the solar energy and convert it into chemical energy by the process of photosynthesis.This chemical energy in the form of carbohydrates or sugar is used as food.

Multiple choice botany ecosystem energy flow in food chain food chain and energy flow energy flow in ecosystem

Sun gives radiation in the form of

  1. Infra-red radiation

  2. Visible light

  3. Ultra-violet

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The radiation emitted from the sun is a mixture of three types of radiation:
  • Ultraviolet rays: UV rays have a wavelength of 0.01 - 10 nm. These rays can have adverse effects like sunburn, skin cancer if exposure occurs for a long period of time.
  • Visible light: Visible spectrum lies in the range of wavelength 400 - 700 nm. These rays are perceived by human eyes. A part of the visible spectrum is used by plants for photosynthesis.
  • Infrared rays: These rays have a wavelength beyond the visible spectrum. Most of the radiation emitted from the sun is in the form of infrared radiation.
Hence, all the options are correct.
So, the correct answer is 'All the above'.
Multiple choice botany ecosystem : structure and function energy flow in food chain food chain and energy flow energy flow in ecosystem

In solar ecosystem, an extra energy is available for system, used for production of:

  1. Organic matters

  2. Food

  3. Water
  4. $CO _{2}$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In a solar ecosystem, plants use solar energy to synthesize organic matter from inorganic substances. This organic matter serves as the energy source for the rest of the ecosystem.

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.