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Assertion : A needle placed carefully pl...

Assertion : A needle placed carefully placed on the surface of water may float.
Reason : When buoyant force balanced with weight of body, the body can float.

A

Both assertion and reason are true and the reason is the correct explanation of the assertion.

B

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

C

Assertion is true but reason is false.

D

Both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
c
Assertion is true but the reason is false.
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KUMAR PRAKASHAN-MECHANICAL PROPERTIES OF FLUIDS -SECTION -C (Objective Questions) (VSQs)
  1. Why tefllon is coated ,the angle of contact between oil and non -stick...

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  2. Why raincoat does not wet in rain ?

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  3. Water rises to a height of 20 mm in a capillary . If the radius of th...

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  4. How the oil lamp produces light through a wick that is lit using a mat...

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  5. Why the moisture is retained in soil when a farm is being plough ?

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  6. Why it is better to wear cotton clothes in summer ?

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  7. Why the refill of marker pen which is used to write on white board is ...

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  8. Why does the water rise in a capillary tube Explain .

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  9. Why does the mercury fall in a capillary tube ?

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  10. A 20 cm long capillary tube is dipped in water The water rises upto 8 ...

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  11. In incompressible flow the density of a fluid changes with time and po...

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  12. Non -viscous flow can be a streamline.

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  13. In a steady flow velocity of the fluid at each point remains identical...

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  14. The Bernoulli equation can be considered to be a statement of the cons...

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  15. The angle of contact between drop of water and material of raincoat is...

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  16. Absence of roughness between two consecutive layers of fluid is the vi...

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  17. If the weight of body is greater than the buoyant force of liquid then...

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  18. Velocity of water at the depth in river is always slow.

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  19. Assertion : For turbulent flow Reynolds number R(e)gt2000. Reason ...

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  20. Assertion : A needle placed carefully placed on the surface of water m...

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