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Chapter 1: Problem 76
Light year is a unit of \(\ldots \ldots \ldots \ldots \ldots\) (a) Mass (b) volume (c) density (d) Distance
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Dimensional formula for torque is (a) \(\mathrm{M}^{2} \mathrm{~L}^{2} \mathrm{~T}^{-3}\) (b) \(\mathrm{M}^{2} \mathrm{~L}^{1} \mathrm{~T}^{-2}\) (c) \(\mathrm{M}^{1} \mathrm{~L}^{1} \mathrm{~T}^{-2}\) (d) \(\mathrm{M}^{1} \mathrm{~L}^{2} \mathrm{~T}^{-2}\)
Find the distance at which 4 AU would subtend an angle of exactly 1 " of arc. $\left[1 \mathrm{AU}=1.496 \times 10^{11} \mathrm{~m}, 1^{\prime \prime}=4.85 \times 10^{-6} \mathrm{rad}\right]$ (a) \(1.123 \times 10^{5} \mathrm{~m}\) (b) \(11.23 \times 10^{5} \mathrm{~m}\) (c) \(1.123 \times 10^{17} \mathrm{~m}\) (d) \(11.23 \times 10^{17} \mathrm{~m}\)
The radius of circle is \(1.26 \mathrm{~cm}\). According to the concept of significant figures area of it can be represented as - (a) \(4.9850 \mathrm{~cm}^{2}\) (b) \(4.985 \mathrm{~cm}^{2}\) (c) \(4.98 \mathrm{~cm}^{2}\) (d) \(9.98 \mathrm{~cm}^{2}\)
unit of universal gravitational constant is ............ (a) \(\mathrm{kg} \mathrm{m} \mathrm{sec}^{-1}\) (b) \(\mathrm{N} \mathrm{m}^{-1} \mathrm{sec}\) (c) \(\mathrm{N} \mathrm{m}^{2} \mathrm{~kg}^{-2}\) (d) \(\mathrm{N} \mathrm{m} \mathrm{kg}^{-1}\)
Which of the following system of unit is not based on only units of mass length and time. (a) SI (b) \(\mathrm{MKS}\) (c) CGS (d) FPS
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