In the picture of the rotating Earth given below, which of the following is the correct position of the pole star?

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(A)

(B)

(C)

(D)

answer is D.

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Detailed Solution

Pole star is situated in the north direction of the earth's axis (D).
A Pole star is the only star in the sky which appears stationary to an observer on Earth. The Pole star is also called Polaris or Dhruvtara in India. The Pole star lies along the direction of the Earth's axis of rotation. Since it lies on the Earth's axis of rotation, it appears stationary to an observer on Earth. Pole star rises in the north and is thus used to find directions as an indicator. Polaris points the way north.
From the given figures, we can identify the axis and direction of rotation of Earth. And we know that the pole star is situated in the north direction of the Earth's axis. We know that the Earth rotates from west to east; thus, from the figure, we can understand that (A) is the west and (C) is the east. So it is evident that (B) is south and (D) is north. So option (D) is correct, which is the north direction of the Earth where the polar star is situated.

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