The term 'polar vortex' refers to: MCQ with Answer and Explanation

The term 'polar vortex' refers to:
A. A warm ocean current
B. A type of tornado
C. A large area of high pressure over the Arctic
D. A large area of low pressure over the Arctic
Answer: Option D
Solution (By JKExamLibrary)
The polar vortex is a large area of low pressure and cold air that encircles the Earth's poles. When it weakens or shifts, it can cause cold air to spill southward into the mid-latitudes.

This question belongs to: Geography GK Climate and Weather

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The 'Sub-Tropical Jet Stream' (STJ) is associated with:
A. Summer monsoon
B. Post-monsoon cyclones
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Correct Answer: Option D


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The Sub-Tropical Jet Stream (STJ) is active during winter and influences Western Disturbances that bring rainfall to northern India.

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Question #2 Report Error
Which of the following is a glacial lake in India?
A. Gurudongmar Lake
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Correct Answer: Option A


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The Coriolis force is maximum at:
A. 60° latitude
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C. 30° latitude
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Correct Answer: Option D


Explanation:
The Coriolis force is maximum at the poles and zero at the equator. It is directly related to the sine of latitude, so it increases from the equator to the poles.

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