Tag: evs

Questions Related to evs

Sun is regarded as the ultimate source of energy because

evs solar energy water cycle earth's energy budget solar energy and its applications

  1. It is the most readily & abundantly available free renewable source of energy

  2. The amount of solar energy received by the earth per hour is much more greater than the total energy consumed by the world each year

  3. The energy derived from different sources is directly or indirectly obtained from sun.

  4. All of the above

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Correct Option: D
Explanation:

Solar energy is a renewable source of energy and is available abundantly and is free of cost. The other forms of energy such as wind energy, thermal energy, chemical energy obtained from plants, etc. are all obtained from Sun. hence sun is the ultimate source of energy as all energy chains start from it.

The existence of life on Earth is primarily due to

evs solar energy water cycle earth's energy budget solar energy and its applications

  1. the formation of fossil fuels on Earth.

  2. the energy from the Sun.

  3. the revolution of Earth around the Sun.

  4. the evolution of species.

Show answer
Correct Option: B
Explanation:

Life on Earth is primarily driven by the energy from the Sun.
A small portion of the Sun's energy reaching the Earth is absorbed by green plants through the process of photosynthesis. This energy is converted into chemical energy and stored in plants. In this process, carbon dioxide and water are converted into carbohydrates. These carbohydrates are used as food by the living organisms. The human beings and animals eat this food to carry out their life activities thus converting the chemical energy into mechanical energy.

Which of the following appliances use solar energy?
a. Water heater
b. Cooker
c. Cells
d. Watches

evs solar energy water cycle earth's energy budget solar energy and its applications

  1. A and C

  2. A, B and C

  3. C and D

  4. All of the above

Show answer
Correct Option: D
Explanation:

Water heater, cooker, cells and watches all use solar energy to create electrical energy.

Choose the correct option:

evs solar energy water cycle earth's energy budget solar energy and its applications

  1. Energy from Sun allows us to see stars.

  2. Sun is the prime source of energy in the universe.

  3. Energy from fossil fuels is primarily derived from solar energy.

  4. Earth rotates around the Sun due to the heat energy from the Sun.

Show answer
Correct Option: C
Explanation:
When light energy from stars reach Earth, they become visible.
Sun is the prime source of energy in solar system only.
Fossil fuels are derived from the decomposition of plants and animals buried under the Earth millions of years ago. Since these organic bodies were based on Sun, energy from the fossil fuels is primarily derived from the Sun.
Earth rotates around the Sun due to the gravitational force between two masses.

The main source of all types of energy on the Earth is :

evs solar energy water cycle earth's energy budget solar energy and its applications

  1. coal

  2. moon

  3. petrolium

  4. sun

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Correct Option: D

Which is the ultimate source of energy?

evs solar energy water cycle earth's energy budget solar energy and its applications

  1. Water

  2. Sun

  3. Uranium

  4. Fossil fuels

Show answer
Correct Option: B
Explanation:

Sun is the ultimate source of energy as all other forms are some how related to it .

Energy from various sources is considered to have been derived from the :

evs solar energy water cycle earth's energy budget solar energy and its applications

  1. Moon

  2. Solar system

  3. Sun

  4. Stars

Show answer
Correct Option: C
Explanation:

Sun is the source of almost all the energies in our Earth. Plants make food using sunlight, the food that we get from plants and animals also has its prime source as sunlight. The fossil fuels that we use in our daily life comes from dead plants and animals which again have their source as solar energy. The wind that blows is due to heat absorbed by the atmosphere from the sunlight.

The main source of heat is

evs solar energy water cycle earth's energy budget solar energy and its applications

  1. The sun

  2. The stars (Excluding the sun)

  3. The interior of the earth

  4. Chemical reactions

  5. Electricity

Show answer
Correct Option: A
Explanation:
Most of the heat energy available on the earth surface comes from the Sun in the form of electromagnetic radiation. 
Sun is the main source of heat on the earth.
Option A

The temperature of core of the sun is in the range of

evs solar energy water cycle earth's energy budget solar energy and its applications

  1. ${1,56,000}^{o}C$

  2. ${15,60,000}K$

  3. ${15,60,000}^{o}C$

  4. $1,56,00,000K$

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Correct Option: D

Sun produces heat and light energy by

evs solar energy water cycle earth's energy budget solar energy and its applications

  1. nuclear fusion of hydrogen atoms into helium atoms

  2. nuclear fission of ${H} _{2}$ atoms into helium atoms

  3. nuclear fission of $He$ atoms into ${H} _{2}$ atoms

  4. nuclear fusion of $He$ atoms into ${H} _{2}$ atoms

Show answer
Correct Option: B