Consider the following statements :
- 1.Jet streams occur in the Northern Hemisphere only.
- 2.Only some cyclones develop an eye.
- 3.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 ?
Show answer
Answer: C. Statement 1 is wrong: jet streams occur in both hemispheres. Statement 2 is correct: only well-developed cyclones form an eye. Statement 3 is wrong: a tropical cyclone has a warm core, so the eye is warmer, not colder, than its surroundings. So only 2.
Watch for: The calm, clear eye feels cool, but sinking air warms it.
Why the other options are wrong
- A. Wrong because jet streams also occur in the Southern Hemisphere.
- B. Wrong because the eye is warmer, not cooler.
- D. Wrong because both 1 and 3 are false.
Source to check: NCERT Class 11 Fundamentals of Physical Geography, Chapter 10 (Atmospheric Circulation and Weather Systems); IMD FAQs on cyclones
Answer from the official UPSC key. Written and fact-checked by AI against the official key. Spotted a mistake? Report it.