Question

DIRECTIONS: Each of these questions contains an Assertion followed by Reason. Read them carefully and answer the question on the basis of the following options. You have to select the one that best describes the two statements.

Assertion : Motion of moon around earth is a non-uniform motion.
Reason : The size of moon is smaller than that of earth.

• A. If both Assertion and Reason are correet and Reason is the correct explanation of Assertion.
• B. If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
• C. If Assertion is correct but Reason is incorrect.
• D. If Assertion is incorrect but Reason is correct.

Answer 1

The correct option is D

If Assertion is incorrect but Reason is correct.

Explanation for correct option:

Option (d): If Assertion is incorrect but Reason is correct.

Assertion:

1. Motion of the moon around the earth is a non-uniform motion.
2. As we know, due to the gravitational force of the earth, the Moon revolves around the earth in a circular orbit.
3. The motion of the moon around the earth is a uniform circular motion, as it covers the same distance in the same span to time.
4. Hence, the statement given in the assertion is not correct.

Reason:

1. The size of the moon is smaller than that of the earth.
2. The diameter of the Moon is approximately $2100miles\approx 3500Km.$, while the diameter of the earth is approximately $7900miles\approx 12800Km.$.
3. Therefore, the size of the earth is approximately $4$ times the size of the moon.
4. Hence, Hence, the statement given in the reason is correct.

Therefore, assertion is incorrect, but the reason is correct.

Hence, option (d) is the correct choice.