Geography
Assertion (A): A bulge in the middle portion of the earth and flattened top at the poles.
Reason (R): Centrifugal force always directed outward, i.e., away from the axis of rotation.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R does not explain A.
- A is true but R is false.
- A is false but R is true.
Answer
Both A and R are true and R is the correct explanation of A.
Explanation — Centrifugal force is an apparent outward force that acts on a rotating object. It is always directed outward, i.e., away from the axis of rotation. The speed of rotation has created a centrifugal force resulting in a bulge in the middle portion of the earth and flattened top at the poles.
Related Questions
What is the time difference between two consecutive lines of longitude?
- 7½ minutes
- 4 minutes
- 1 minute
- 3 minutes
Which of the following is true about the revolution of the earth around the sun?
- It results in the cycle of seasons
- The direction of motion is the same as rotation
- The speed is not uniform
- All of the above.
Assertion (A): In the course of the earth's movement around the sun, the North Pole remains inclined towards the sun for a part of the year while the South Pole is tilted away from it.
Reason (R): The earth rotates on an inclined axis in an elliptical path around the sun.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R does not explain A.
- A is true but R is false.
- A is false but R is true.
Which of the following is true about the perihelion position of the earth?
- It is farthest from the sun.
- It occurs on 3 January.
- The speed of revolution is the least.
- All of the above.