Physics and Measurement (KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 1 - 3 of 8

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Question number: 1

» Physics and Measurement » Dimensional Analysis and Its Applications

Appeared in Year: 2012

MCQ▾

Question

A liquid drop placed on a horizontal plane has a near spherical shape (slightly flattened due to gravity). Let R be the radius of its largest horizontal section. A small disturbance causes the drop to vibrate with frequency ν about its equilibrium shape. By dimensional analysis the ratio νσρR3 can be (here σ is surface tension, ρ is density, g is acceleration due to gravity, and k is an arbitrary dimensionless constant)

Choices

Choice (4) Response

a.

K=ρgσ

b.

K=ρR3gσ

c.

K=ρgR2σ

d.

K=ρR2gσ

Question number: 2

» Physics and Measurement » Dimensional Analysis and Its Applications

Appeared in Year: 2012

MCQ▾

Question

The potential energy of a point particle is given by the expression V(x)=αx+βsin(xγ) . A dimensionless combination of the constants α, β and γ is –

Choices

Choice (4) Response

a.

αβγ

b.

α2βγ

c.

γαβ

d.

αγβ

Question number: 3

» Physics and Measurement » Accuracy and Precision of Measuring Instruments

Appeared in Year: 2011

MCQ▾

Question

Four students measure the height of a tower. Each student uses a different method and each measures the height many different times. The data for each are plotted below. The measurement with highest precision is,

Choices

Choice (4) Response

a.

Graph of Number of Trials verses Height Choice A

Graph of Number of Trials Verses Height Choice A

in figure graph of number of trials verses height is shown.

b.

 Graph of Number of Trials verses Height Choice B

Graph of Number of Trials Verses Height Choice B

in figure graph of number of trials verses height is shown.

c.

 Graph of Number of Trials verses Height Choice C

Graph of Number of Trials Verses Height Choice C

In figure graph of number of trials verses height is shown.

d.

Graph of Number of Trials verses Height Choice D

Graph of Number of Trials Verses Height Choice D

In figure graph of number of trials verses height is shown.

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