AIIMS Physics: Questions 211 - 214 of 500

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Question number: 211

» 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

Question number: 212

» Ray Optics » Total Internal Reflection

Appeared in Year: 2005

Assertion-Reason▾

Assertion (Ꭺ)

Diamond glitters brilliantly.

Reason (Ꭱ)

Diamond does not absorb sunlight.

Choices

Choice (4) Response

a.

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

b.

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

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are false

Question number: 213

» Ray Optics » Snell's Law

MCQ▾

Question

Velocity of light in a liquid is Equation and in air, it is Equation . If a ray of light passes from this liquid into air, the critical angle will be –

Choices

Choice (4) Response

a.

600

b.

450

c.

300

d.

Question does not provide sufficient data or is vague

Question number: 214

» 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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