Consider the following statements:Jet streams occur in the Northern Hemisphere only.Only some cyclon

Q: What is UPSC Prelims?

UPSC Prelims is a competitive examination conducted in India. This question is from the 2020 UPSC Prelims Geography paper.

Q: How can I prepare for UPSC Prelims Geography?

To prepare for UPSC Prelims Geography, practice previous year questions (PYQs), understand concepts thoroughly, and solve mock tests regularly. This 2020 question covers Cyclones, Floods, Tsunamis & Natural Disasters topic.

Q: What is the difficulty level of this question?

This UPSC Prelims 2020 Geography question has a medium difficulty level and is marked as an important question.

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You can find more UPSC Prelims previous year questions on AspirantMitraa. Browse by subject, topic, year, and difficulty level to practice effectively.

Question

Consider the following statements:Jet streams occur in the Northern Hemisphere only.Only some cyclones develop an eye.The temperature inside the eye of a cyclone is nearly 10°C lesser than that of the surroundings.Which of the statements given above is/are correct?

Accepted Answer

Correct Answer: C — 2 onlyStep-by-step Solution:Statement 1: Incorrect. Jet streams occur in both Northern and Southern Hemispheres. They are fast‑flowing narrow air currents in the upper atmosphere. ✗Statement 2: Correct. Not all cyclones (tropical cyclones) develop a well‑formed eye; only intense cyclones with wind speeds above 74 mph typically have an eye. ✓Statement 3: Incorrect. The eye of a cyclone is actually warmer than the surrounding environment (warm core). At the surface, the temperature difference is small (0–2°C), but aloft (12 km altitude), it can be 10°C warmer, not cooler. ✗Why other options are incorrect:Option A (1 only): False.Option B (2 and 3): Statement 3 false.Option D (1 and 3): Both false.Key Concept: The eye is the calm centre of a tropical cyclone, with sinking air, light winds, and often clear skies. The eyewall has the strongest winds. Cyclones in the Bay of Bengal and Arabian Sea affect India. IMD uses satellite and radar to track cyclone development.

Consider the following statements:Jet streams occur in the Northern Hemisphere only.Only some cyclones develop an eye.The temperature inside the eye of a cyclone is nearly 10°C lesser than that of the surroundings.Which of the statements given above is/are correct?

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Consider the following statements:Jet streams occur in the Northern Hemisphere only.Only some cyclones develop an eye.The temperature inside the eye of a cyclone is nearly 10°C lesser than that of the surroundings.Which of the statements given above is/are correct?

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More Questions from Cyclones, Floods, Tsunamis & Natural Disasters

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