Tag: example of some natural phenomena

Questions Related to example of some natural phenomena

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

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

  1. Sailing boat in an ocean

  2. Rowing boat on a windy day

  3. Aeroplane in a sky

  4. All the above

Show answer
Correct Option: D
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.

What affects the direction of kite in the sky ?

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

  1. Motion of bird in the sky

  2. Clouds in the sky

  3. Wind blowing in the sky

  4. Other kites around it

Show answer
Correct Option: C
Explanation:
A kite relies on tension from the string and moving air created by the wind or the forward motion of the kite flyer to generate thrust.

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

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

  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

Show answer
Correct Option: A
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.

Which of the following can be described as convection current

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

  1. Sea Breeze and land Breeze

  2. Heat transfer from one end to another in a metal rod

  3. Sun's radiations

  4. None of these

Show answer
Correct Option: A
Explanation:

Sea breeze and land breeze are described as convection current.

Which of the following are caused by wind ?

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

  1. The rotation of windmills

  2. Swinging of flowers

  3. Fluttering of the flags

  4. All of the above

Show answer
Correct Option: D
Explanation:
The windmills rotate only when there is wind. Flowers swing in presence of wind. Flags also swing in presence of wind.  Hence, all of the above are caused by wind.

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

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

  1. Hydroelectric Power plant

  2. Nuclear reactor

  3. Windmill

  4. Thermal power plant

Show answer
Correct Option: C
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.

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

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

  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

Show answer
Correct Option: A
Explanation:
The still air below the paper had greater pressure than the moving air above the paper resulting in paper getting pushed up.

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 ?

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

  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

Show answer
Correct Option: A

How are monsoon winds formed?

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

  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

Show answer
Correct Option: A
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.

What is the direction of Monsoon winds in Summer ?

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

  1. From ocean towards the land

  2. From land towards the ocean

  3. From equator towards the poles

  4. From poles towards the equator

Show answer
Correct Option: A
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 winds.