With reference to "Coriolis force", which of the following statements is/are correct? 1. It increases with increase in wind velocity. 2. It is maximum at the poles and is absent at the equator. Select the answer using the code given below:
A1 only
B2 only
CBoth 1 and 2
DNeither 1 nor 2
Answer & Solution
Correct answer: C. Both 1 and 2
Answer: C. Both statements about the Coriolis force are correct.
The Coriolis force has magnitude F = 2 m ω v sin(φ), where ω is Earth's angular velocity, v is the velocity of the moving object, and φ is the latitude.
Statement 1 is CORRECT: F is directly proportional to wind velocity v. Faster winds experience stronger Coriolis deflection.
Statement 2 is CORRECT: sin(φ) is 0 at the equator (φ = 0) and ±1 at the poles (φ = ±90°). So Coriolis force is ZERO at the equator and MAXIMUM at the poles. This is why hurricanes do not form at the equator.
Source: NCERT Class 11 Fundamentals of Physical Geography, Ch 10 (Atmospheric Circulation and Weather Systems).
Related questions
Which of the following plays an important role in causing rainfall?The Black soil of India is also known as ____ soil.Which Indian state is the world's largest producer of the golden 'Muga' silk?Which wildlife sanctuary was declared the first national park in India?Which one of the following communities is an African community?Which type of forest is found in the Ganga-Brahmaputra delta?On the equinoxes, which of the following occurs?The Bhopal disaster of 1984 was the result of which kind of accident?