Tag: wind and rain

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Questions Related to wind and rain

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

Which of the following is an example of mode of transport making use of air pressure ?

  1. Sailing boat in an ocean

  2. Rowing boat on a windy day

  3. Aeroplane in a sky

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A moving boat's sail is shaped as an airfoil like the wing of a plane. When air moves over a plane's wing, from front to back, wind flowing over the top of the wing has to travel farther than wind flowing under the wing's bottom surface. This creates a pressure difference that lifts the plane.
Hence all the above is the answer.
Multiple choice physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth

Which of the following is not an example of air exerting pressure ?

  1. Pressing the brakes of a bicycle.

  2. Filling up the bicycle tube with air

  3. Riding bicycle against the flow of wind

  4. Playing with the kite
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Brakes on a bicycle work using friction (the rubbing force between two things that slide past one another while they're touching). Hence brakes doesn't work on the principle of air exerting pressure.
Multiple choice physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth

Which source of energy makes use of the air pressure in generation of energy ?

  1. Hydroelectric Power plant

  2. Nuclear reactor

  3. Windmill

  4. Thermal power plant
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Windmill makes use of the air pressure in the generation of energy, as hydroelectric power plants capture the energy of falling water to generate electricity.
A nuclear reactor produces electricity by chain reaction produces the energy, which turns water into steam. The pressure of the steam turns a generator, which produces electricity. 
In a thermal power plant fuel is burned to produce heat, this heat is used to change water into steam. this drives the generator to produce electricity.
Whereas in windmill the energy in the wind turns two or three propeller-like blades around a rotor. The rotor is connected to the main shaft, which spins a generator to create electricity.
Multiple choice physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth

A strip of paper is held between thumb and finger. If we blow over the paper, what will happen to the paper strip ?

  1. The paper strip will be lifted up

  2. The paper strip will bend down

  3. The paper strip will oscillate up and down alternately

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The still air below the paper had greater pressure than the moving air above the paper resulting in paper getting pushed up.
Multiple choice physics air, winds and cyclones wind and rain example of some natural phenomena uneven heating of earth

An experiment is conducted to understand air pressure. Two identical balloons are filled with little water and blown. Then they are tied to a string some distance apart. What happens when air is blown in between them ?

  1. They move closer to each other.

  2. They move further apart.

  3. One moves up and other moves down

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

According to Bernoulli's principle, an increase in the speed of a fluid occurs simultaneously with a decrease in static pressure. Blowing air between the balloons creates a low-pressure region, causing the higher atmospheric pressure on the outside to push the balloons toward each other.

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

How are monsoon winds formed?

  1. The air over the land gets heated and rises. This causes the winds to flow from the oceans towards the land, which gives rise to Monsoon winds.

  2. The pressure difference in adjoining areas gives rise to air movement which leads to formation of Monsoon winds

  3. Air that is warmed up near the Equator, moves towards each pole causing the Monsoon winds to blow.

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The air over the land gets heated and rises. This causes the winds to flow from the oceans towards the land. These are monsoon wind.