AIIMS (All India Institute of Medical Sciences) Physics: Questions 223 - 225 of 500

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Question number: 223

» Atoms and Nuclei » Radioactive Decay Law

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Appeared in Year: 2004

Assertion-Reason▾

Question

Assertion (Ꭺ)

90Sr from the radioactive fail out from a nuclear bomb ends up in the bones of human beings through the milk consumed by them. It causes impairment of the production of red blood cells.

Reason (Ꭱ)

The energetic – particles emitted in the decay of 90Sr damage the bone marrow.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are false

b.

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

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: 224

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

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Appeared in Year: 1995

Assertion-Reason▾

Question

Assertion (Ꭺ)

A needle placed carefully on the surface of water may float where a ball of the same material will always sink.

Reason (Ꭱ)

The buoyancy of an object depends both on the material and shape of the object.

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 false

c.

Ꭺ is true but Ꭱ is false

d.

Ꭺ is false but Ꭱ is true

Question number: 225

» Communication System » Bandwidth of Transmission Medium

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Appeared in Year: 2003

Assertion-Reason▾

Question

Assertion (Ꭺ)

Microwave communication is preferred over optical communication.

Reason (Ꭱ)

Microwaves provide large number of channels and band width compared to optical signals.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is false but Ꭱ is true

c.

Ꭺ is true but Ꭱ is false

d.

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

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