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Chapter 1: Problem 21
At present state, there are \(\ldots \ldots \ldots \ldots . .\) fundamental forces in nature. (a) \(\operatorname{six}\) (b) four (c) two (d) five
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Dimensional formula for thermal conductivity (k) is.. (a) \(\mathrm{M}^{2} \mathrm{~L}^{1} \mathrm{~T}^{-2} \mathrm{~K}^{-1}\) (b) \(\mathrm{M}^{1} \mathrm{~L}^{1} \mathrm{~T}^{-2} \mathrm{~K}^{1}\) (c) \(\mathrm{M}^{1} \mathrm{~L}^{0} \mathrm{~T}^{-3} \mathrm{~K}^{-1}\) (d) \(\mathrm{M}^{1} \mathrm{~L}^{1} \mathrm{~T}^{-3} \mathrm{~K}^{-1}\)
Match list - I with list - II $$ \begin{array}{|l|l|} \hline \multicolumn{1}{|c|} {\text { List - I }} & \multicolumn{1}{|c|} {\text { List - II }} \\ \hline \text { (1) Joule } & \text { (a) henry } \times \text { ampere/sec } \\\ \hline \text { (2) Watt } & \text { (b) coulomb } \times \text { volt } \\ \hline \text { (3) volt } & \text { (c) meter } \times \text { ohm } \\ \hline \text { (4) Resistivity } & \text { (d) (ampere) }^{2} \times \text { ohm } \\ \hline \end{array} $$ (a) \(b, d, c, a\) (b) \(c, a, b, d\) (c) \(b, d, a, c\) (d) \(b, c, a, d\)
If the length of rod \(\mathrm{A}\) is \((2.35 \pm 0.01) \mathrm{cm}\) and that of \(\mathrm{B}\) is \((5.68 \pm 0.01) \mathrm{cm}\) then the rod \(\mathrm{B}\) is longer than \(\mathrm{rod} \mathrm{A}\) by \(\ldots\) (a) \((2.43 \pm 0.00) \mathrm{cm}\) (b) \((3.33 \pm 0.02) \mathrm{cm}\) (c) \((2.43 \pm 0.01) \mathrm{cm}\) (d) \((2.43 \pm 0.001) \mathrm{cm}\)
In an experiment to determine the density of a cube the percentage error in the measurement of mass is \(0.25 \%\) and the percentage error in the measurement of length is \(0.50 \%\) what will be the percentage error in the determination of its density? (a) \(2.75 \%\) (b) \(1.75 \%\) (c) \(0.75 \%\) (d) \(1.25 \%\)
The dimensional formula of magnetic flux is ............ (a) \(\mathrm{M}^{1} \mathrm{~L}^{2} \mathrm{~T}^{-2} \mathrm{~A}^{-1}\) (b) \(\mathrm{M}^{1} \mathrm{~L}^{2} \mathrm{~T}^{1} \mathrm{~A}^{2}\) (c) \(\mathrm{M}^{1} \mathrm{~L}^{2} \mathrm{~T}^{-2} \mathrm{~A}^{2}\) (d) \(\mathrm{M}^{-1} \mathrm{~L}^{-2} \mathrm{~T}^{1} \mathrm{~A}^{2}\)
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