Question

Assertion: For the flow to be streamlined, value of critical velocity should be as low as possible
Reason: Once the actual velocity of flow of liquid becomes greater than the critical velocity, the flow becomes turbulent.

• A. Both assertion and reason are true and reason is correct explanation of assertion.
• B. Both assertion and reason are true but reason is not the correct explanation of assertion.
• C. Assertion is true but reason is false.
• D. Both assertion and reason are false.

Answer 1

The correct option is B Both assertion and reason are true but reason is not the correct explanation of assertion.

Critical velocity is the velocity of a liquid flow upto which its flow is streamlined and after which its flow becomes turbulent.

And,reynold's number is directly proportional to critical velocity which determines the streamline flow. If the number is small the flow of liquid is streamline.

Both the statements are true but reason is not the correct explanation of assretion.