Properties of Solids & Liquids (AIIMS (All India Institute of Medical Sciences) Physics): Questions 18 - 21 of 48

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Question number: 18

» Properties of Solids & Liquids » Viscosity

Appeared in Year: 1995

Assertion-Reason▾

Assertion (Ꭺ)

Machine parts are jammed in winter.

Reason (Ꭱ)

The viscosity of lubricant used in machine part decrease at low temperature,

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are false

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Question number: 19

» Properties of Solids & Liquids » Specific Gravity

Appeared in Year: 2005

Assertion-Reason▾

Assertion (Ꭺ)

Specific gravity of a fluid is a dimensionless quantity.

Reason (Ꭱ)

It is the ratio of density of fluid to the density of water.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Ꭺ is false but Ꭱ is true

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

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Question number: 20

» Properties of Solids & Liquids » Heat Transfer » Convection

Appeared in Year: 2006

Assertion-Reason▾

Assertion (Ꭺ)

Perspiration from human body helps in cooling the body.

Reason (Ꭱ)

A thin layer of water on the skin enhances its emissivity.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is false but Ꭱ is true

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Ꭺ is true but Ꭱ is false

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Question number: 21

» Properties of Solids & Liquids » Boyle's Law & Applications

Appeared in Year: 2006

Assertion-Reason▾

Assertion (Ꭺ)

A thin stainless steel needle can lay floating on a still water surface.

Reason (Ꭱ)

Any object floats when the buoyancy force balances the weight of the object.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are false

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