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Chapter 1: Problem 1
Physics is one of the basic disciplines in the category of ..... sciences. (A) Astro (B) Natural (C) Space (D) Genetic
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100 watt hour \(=\ldots \ldots \ldots \ldots \ldots\) joule. (a) \(3.6 \times 10^{5} \mathrm{~J}\) (b) \(3.6 \times 10^{6} \mathrm{~J}\) (c) \(36 \times 10^{5} \mathrm{~J}\) (d) \(36 \times 10^{6} \mathrm{~J}\)
For a sphere having volume is given by \(\mathrm{V}=(4 / 3) \pi \mathrm{r}^{3}\) What is the equation of the relative error \((\Delta \mathrm{V} / \mathrm{V})\) in measurement of the volume \(\mathrm{V}\) ? (a) \(3(\Delta \mathrm{r} / \mathrm{r})\) (b) \(4(\Delta \mathrm{r} / \mathrm{r})\) (c) \((4 / 3)(\Delta \mathrm{r} / \mathrm{r})\) (d) \((1 / 3)(\Delta \mathrm{r} / \mathrm{r})\)
For measurement of astronomical distance ............. is used. (a) vernier callipers (b) spherometer (c) screw gauge (d) indirect method
If \(\mathrm{A}=\mathrm{b}^{4}\) the fractional error in \(\mathrm{A}\) is $\ldots \ldots \ldots \ldots$ (a) \(\left[(\Delta \mathrm{b})^{4} /(\mathrm{b})\right]\) (b) \([\Delta \mathrm{b} / \mathrm{b}]\) (c) \(4[(\Delta \mathrm{b}) /(\mathrm{b})]\) (d) \((\Delta \mathrm{b})^{4}\)
Write the dimensional formula of r.m.s (root mean square) speed. (a) \(\mathrm{M}^{1} \mathrm{~L}^{2} \mathrm{~T}^{-2}\) (b) \(\mathrm{M}^{0} \mathrm{~L}^{2} \mathrm{~T}^{-2}\) (c) \(\mathrm{M}^{0} \mathrm{~L}^{1} \mathrm{~T}^{-1}\) (d) \(\mathrm{M}^{1} \mathrm{~L}^{0} \mathrm{~T}^{-1}\)
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