Properties of Solids & Liquids (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 7 - 10 of 12

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Question number: 7

» Properties of Solids & Liquids » Stress-Strain Relationship

MCQ▾

Question

A metal wire of cross-sectional area 9×106m2 is held taut at 500 C between two rigid supports with negligible tension in it. The tension developed in the wire if it cooled to -100 C is –

(Given α of metal =2×105K1 and Y=1×1011Nm2. )

Choices

Choice (4) Response
a.

1440 N

b.

1200 N

c.

1080N

d.

563 N

Question number: 8

» Properties of Solids & Liquids » Temperature

MCQ▾

Question

A body cools from 600 C to 550 C in t1 minutes, from 550 C to 500 C in t2 minutes and from 500 C to 450 C in t3 minutes. Then the relation between t1, t2 and t3 is –

Choices

Choice (4) Response
a.

t1=t2=t3

b.

t1>t2>t3

c.

t1<t2<t3

d. Question does not provide sufficient data or is vague

Question number: 9

» Properties of Solids & Liquids » Application of Surface Tension

MCQ▾

Question

A air bubble is formed at the bottom of a lake. When the bubble rises to the surface, its radius increases 4 times. The depth of the lake at that spot is –

Choices

Choice (4) Response
a.

h=16dg(P0+T2r)

b.

h=15dg(P0+T2r)

c.

h=(64dgP0+15Tr)

d.

h=3dg[21P0+10Tr]

Question number: 10

» Properties of Solids & Liquids » Application of Surface Tension

MCQ▾

Question

A air bubble is formed at the bottom of a lake. When the bubble rises to the surface, its radius increases 3 times. The depth of the lake at that spot is –

Choices

Choice (4) Response
a.

h=1dg[13P0+8Tr]

b.

h=2dg[13P0+8Tr]

c.

h=2dg[13P0+9Tr]

d.

h=2dg[27P0+9Tr]

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