Physics

# Thickness of a pencil measured by using a screw gauge (least count .$001\ cm$) comes out to be $0.802\ cm$. The percentage error in the measurement is :

$0.125\%$

##### SOLUTION
Least count screw gause is $= 0.001 cm$

The error will be thickness, $t = 0.802 \pm 0.001$

$\Delta t$ is $0.001 cm$

Percentage error $= \dfrac{\Delta t}{t} \times 100\%$

Percentage error $= \dfrac{0.001}{0.802} \times 100\%$

Percentage error $= 0.125\%$

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Single Correct Medium Published on 18th 08, 2020
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