Physics and Measurement (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 4 - 6 of 6

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Question number: 4

» Physics and Measurement » Dimensions of Physical Quantities

Appeared in Year: 2015

MCQ▾

Question

The dimension of the area A of a black hole can be written in terms of the universal gravitational constant G, its mass M and the speed of light c as A=GαMβcγ . Here,

Choices

Choice (4) Response

a.

α=2,β=2andγ=4

b.

α=3,β=3andγ=2

c.

α=2,β=2andγ=4

d.

α=3,β=3andγ=2

Question number: 5

» Physics and Measurement » Dimensions of Physical Quantities

Appeared in Year: 2014

MCQ▾

Question

The dimensions of Stefan-Boltzmann constant σ can be written in terms of Planck’s constant h, Boltzmann constant kB and the speed of light c as σ=hαkBβcγ . Here –

Choices

Choice (4) Response

a.

α=3, β = –4 and γ = 2

b.

α=2,β=3andγ=1

c.

α=3,β=4andγ=3

d.

α=3,β=4andγ=2

Question number: 6

» Physics and Measurement » Accuracy and Precision of Measuring Instruments

MCQ▾

Question

In an experiment, on the measurement of g, using a simple pendulum, the time period was measured with an accuracy of 0.3 % while the length was measured with an accuracy of 0.4%. What is the percentage accuracy in the value of g thus obtained?

Choices

Choice (4) Response

a.

1 %

b.

0.9 %

c.

1.2 %

d.

0.7 %

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