Question

The coriolis force is caused due to
A. Wind movement
B. Earth rotation
C. Cyclonic depression
 D. Jet stream

Answer 1

Hint: According to Coriolis effect, a mass moving in a rotating system which encounters a force acting perpendicular to the direction of motion and to the axis of rotation.

Complete Answer:
a.Coriolis force is not caused due to wind movement. This option is incorrect.

b. The coriolis force is the result of the rotation of the earth. The objects in the Northern Hemisphere are diverted to the right, and those in the Southern Hemisphere are diverted to the left because of the Coriolis force.

-Earth's rotation is the primary reason for the Coriolis effect.
The Coriolis effect decreases as the latitude decreases.

- Due to the coriolis effect, cold air from the poles moving toward the equator are diverted towards the west and a low pressure area is developed around the equator where the winds are calm.

c. Cyclonic depressions don't give rise to Coriolis force. This option is correct.

d. Jet streams don't cause Coriolis force. This option is correct.

Hence, the correct answer is option 'b'.

Note:
-The effect of the Coriolis force is greatest at the poles and zero at the equator due to the spherical shape of the Earth.
-Gustave-Gaspard Coriolis is the one who first founded and discovered the Coriolis effect.
- The Coriolis effect causes low pressures to rotate anti-clockwise in the northern hemisphere and clockwise in the southern hemisphere.