Tag: wind and rain

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Multiple choice physics air, winds and cyclones the concept of bernoulli's principle air exerts pressure wind and pressure wind and rain uneven heating of earth

The continuous spectrum is obtained when the incandescent substance is?

  1. In state of atomic vapour

  2. In solid state

  3. In state of molecular vapour

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

An incandescent light bulb produces a continuous spectrum because the source of the light is a metal filament (i.e. solid).

Multiple choice physics winds, storms and cyclones wind and rain example of some natural phenomena uneven heating of earth

Ocean thermal energy is due to 

  1. temperature difference at different levels in the ocean

  2. tides in the ocean

  3. energy stored by the water waves

  4. pressure different at different levels in the ocean
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Different temperature at different levels of ocean.

The sun’s heat warms the surface water a lot more than the deep ocean water, which creates the ocean’s naturally available temperature gradient, or thermal energy.

Multiple choice physics winds, storms and cyclones wind and rain example of some natural phenomena uneven heating of earth

Wind currents are generated due to:

  1. Uneven heating between the equator and the poles

  2. Change in atmospheric pressure

  3. Thunderstorm

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

The correct answer is option(A).

We know poles are cooler than equator as highest intensity of the sun's heat and light falls on the equator and it reduces as we go either side of the equator towards the poles. Cooler air from the surrounding areass of the equator comes towards the equator to fill the place of warm air which rises up due to sun's heating. Hence, wind currents are generated due to uneven heating.

Multiple choice physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

During day time air blows-

  1. from the land to the sea

  2. from the sea to the land

  3. from one sea to another

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
During day time air blows $\rightarrow$ from sea to land, because in day time the land is warmer than sea.
Therefore air pressure of land is lower than sea.
As a result air blows from sea to land.
Multiple choice physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

State True and False :
During the day, land gets heated faster than water.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
During day, land gets heated faster than water as the heat capacity of land is lower than the heat capacity of water. Air above the land gets warmer and rises up. The cold air above sea moves towards land to takes its place.
Multiple choice physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

During night time cool breeze blows from_to __

  1. land, sea

  2. sea,land

  3. mountain,land

  4. land,mountain
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
During night time cool breeze blows from land to sea.
As we know, water is good absorber of heat, it takes more time to heat up and cool down water than that of land. And during night, land cools down quickly than that of water causing high pressure over land and hot air above water causes low pressure over water. As we know wind blow from higher pressure to lower pressure, so during night cool breeze blows from land to sea.
Multiple choice physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle
State True or False :
Convection currents are set up giving rise to sea breezes. 

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Yes, it is true; convection current are set up giving rise to sea breezes.

Convectional currents are the result of differential heating. Less dense(lighter) warm materials rise while heavier(more dense) cool materials sink. It is the movement that creates circulation pattern known as convectional current in atmosphere, water and mantle of earth.

Multiple choice physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth the concept of bernoulli's principle

State whether given statement is True or False
During the night, land cools faster than sea.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

It is true that during night; land cools faster than sea.

As we know; water is good absorber of heat, it takes more time to heat up and cool down too. So during night; land cools faster than water.