A screw gauge has least count of $0.01\, mm$ and there are $50$ divisions in its circular scale. The pitch of the screw gauge is $........mm$
A$1.0$
B$0.01$
C$0.25$
D$0.5$
NEET 2020, Easy
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D$0.5$
d $L.C.$ $=\frac{\text { Pitch }}{\text { Number of division on circular scale }}$
$\Rightarrow 0.01 mm =\frac{\text { Pitch }}{50}$
$\Rightarrow$ Pitch $=0.5 mm$
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The amount of heat energy $Q$, used to heat up a substance depends on its mass $m$, its specific heat capacity $(s)$ and the change in temperature $\Delta T$ of the substance. Using dimensional method, find the expression for $s$ is (Given that $\left.[s]=\left[ L ^2 T ^{-2} K ^{-1}\right]\right)$ is