Tag: evs

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Questions Related to evs

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

Sun loses approximately a weight of ________ every second which is the amount of ${H} _{2}$ gas that the sun turns into energy.

  1. $4$ lakh million tons
  2. $4$ million tons
  3. $4$ lakh tons
  4. $40$ lakh tons
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Sun loses approximately 4 million tons of mass every second as it converts hydrogen into helium through nuclear fusion.

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

The correct order of spatial location of different layer of sun are

  1. core-radiative zone-convective zone-photosphere-chromosphere-transition region

  2. core-convective zone-chromosphere-photosphere-radiative zone

  3. core-convective zone-photosphere-chromosphere-convective zone-radiative zone

  4. core-radiative zone-convective zone-chromosphere-convective zone-photosphere
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The correct spatial order from the center outward is: Core, Radiative Zone, Convective Zone, Photosphere, Chromosphere, and Transition Region.

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


Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun's energy?

  1. Geothermal energy

  2. Wind Energy

  3. Nuclear energy

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

Nuclear energy is not ultimately derived from the Sun's energy as uses radioactive substances to produce energy.

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

The sun radiates electromagnetic energy at the rate of $3.9 \times 10^{26}W$. Its radius is $6.96\times 10^8m$.The intensity of sun light at the solar surface will be $-(in \, W/m^2)$

  1. $1.4 \times 10^4$
  2. $2.8 \times 10^5$
  3. $4.2 \times 10^6$
  4. $5.6 \times 10^7$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

$I=\frac { P }{ { 4\pi { R^{ 2 } } } } =\frac { { 3.9\times { { 10 }^{ 26 } } } }{ { 4\times 3.14\times { { \left( { 6.96\times { { 10 }^{ 8 } } } \right)  }^{ 2 } } } } =5.6\times { 10^{ 7 } }w/{ m^{ 2 } }$

Multiple choice evs modern agriculture agricultural practices in india different types of farming and agriculture various agricultural practices

Slash and burn agriculture is known as

  1. Organic farming

  2. Step forming

  3. Crop rotation

  4. Jhum cultivation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Shifting cultivation, also known as the slash and burn agriculture (Jhum cultivation), is the process of growing crops by first clearing the land of trees and vegetation and burning them thereafter. The burnt soil contains potash which increases the nutrient content of the soil. This burnt land is left for 5-8 years, so as to give the soil the time to regain its fertility .
So, the correct option is 'Jhum cultivation'
Multiple choice evs modern agriculture agricultural practices in india different types of farming and agriculture various agricultural practices

Slash and burn agriculture is the other name of

  1. Step farming

  2. Crop rotation

  3. Organic farming

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

A. Step farming is a piece of sloped plane that as been cut into a series of successively receding flat surfaces or platforms, which resemble steps, for the purposes of more effective farming.It is also called as terrace farming.
B. Crop rotation is the practice of growing a series of dissimilar or different types of crops in the same area in sequenced seasons.
C. Organic farming is a method of crop and livestock production that involves much more than choosing not to use pesticides, fertilizers, genetically modified organisms and growth hormone.
D. Jhoom cultivation, also known as the slash and burn agriculture, is the process of growing crops by first clearing the land of trees and vegetation and burning them thereafter. The burnt soil contains potash which increases the nutrient content of the soil.
So, the correct answer is 'Jhoom cultivation'.
Multiple choice evs modern agriculture agricultural practices in india different types of farming and agriculture various agricultural practices

Which of the following is not a safe harvesting process followed by farmers?

  1. Winnowing

  2. Threshing

  3. By using a mechanized harvester

  4. Harvesting on roads
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A.Winnowing is a farming method used for separating grain from chaff.
B.Threshing is the process of loosening the edible part of grain from the husks and straw to which it is attached. 
C.The modern combine harvester, or simply combine, is a versatile machine designed to efficiently harvest a variety of grain crops. 
D.Amongst all these harvesting on the road is dangerous , since it can cause many accidents . '
So the correct option is ' Harvesting on roads ' .

Multiple choice evs modern agriculture agricultural practices in india different types of farming and agriculture various agricultural practices

The process that is used to separate grain from stalks etc.is called as 

  1. Separation

  2. Threshing

  3. Hand picking

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

The process that is used to separate grain from stalks etc. is threshing. In this process, the stalks are beaten to free the grain seeds.

So, the correct answer is 'threshing'