Question

What is the other name of “doldrums”?
A. Sub-Tropical high belt
B. Sub-Polar low-pressure belt
C. Polar high-pressure belt
D. Equatorial low-pressure belt

Answer 1

Hint:
 It is called doldrums because the wind at this altitude is very calm and is not at a very fast pace.

Complete answer:
Doldrums is the belt where the wind is blown at a very calm pace as the rays of the sun fall vertically on the Earth as the heat is very intense and the temperature is very high the movement of the wind becomes warm and expands. At this level, the conversation current also spreads the heat to the upper layer of the atmosphere which would lead to the creation of a low-pressure belt in that particular region. At this pressure belt, the winds do not blow up at a very fast pace so that is the reason why this belt is known as the Belt of Calms or the Belt of Doldrums. It is called an Equatorial low-pressure belt. As the wind which is blowing to the southern and northern hemisphere in the subtropical zone is as the flow of the wind is very low and calm at this belt. The Doldrums lie at the altitude between 10 N and 10 S latitude as it may also vary sometimes between 5 n to 5 S as this belt is the zone of convergence of trade of winds from the hemisphere as the subtropical high-pressure belt is easily there.

Hence, the correct answer is option D.

Note:
This belt has low wind flow because of its latitude as the belt may vary its position from the Sun in some apparent movement situations.