Question

Assertion: Tightening the cap of an ink bottle involves the application of a couple.

Reason: A couple always produces motion of rotation in a rigid body.

Options

• If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.

• If both Assertion and Reason are true, but Reason is not correct explanation of the Assertion.

• If Assertion is true, but the Reason is false.

• If Assertion is false, but the Reason is true.

Answer 1

If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.

Explanation:

While tightening the cap of an ink bottle, two equal and opposite forces act at different points of the cap, producing a turning effect. Therefore, the Assertion (A) is true.

A couple produces rotational motion or a turning effect in a rigid body. Therefore, the Reason (R) is true and correctly explains the Assertion.

Hence, both A and R are true and R is the correct explanation of A.