Question

Select the correct statement about winds.

• A. High-speed winds reduce the air pressure in the region of wind flow.
• B. High-speed winds increase the air pressure in the region of wind flow.
• C. Wind increases the density of the air in the region of wind flow
• D. None of these.

Answer 1

The correct option is A

High-speed winds reduce the air pressure in the region of wind flow.

The explanation of the correct option

In the case of option A

1. We need to know what happens when there is a strong wind blowing.
2. Bernoulli's principle states that the velocity of a fluid at a given location dictates the fluid pressure in that location. The fluid's pressure on its container is proportional to the velocity of the air inside the container.
3. This is why it is recommended that we stay away from the rail on a platform where fast trains pass. When a train passes in front of you at a high speed, the air around you accelerates as well.
4. As a result, a low-pressure zone forms between the person standing near the track and the train, which is strong enough to pull the person into the track, resulting in a serious accident.
5. As a result, we can deduce that high-speed winds are accompanied by low-pressure areas.

The explanation of the incorrect option

In the case of option

1. As we have discusses above high-speed winds reduce the air pressure in the region of wind of flow. So this option is incorrect.

In the case of option C

1. Wind increases the density of the air in the region of wind flow is the incorrect statement.
2. Due to the increase in wind, there will be no change in the density of air there will be only a change in pressure.

In the case of option D

1. As we have got one of the correct options. So this option cannot be correct.

Hence, correct option is A