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  • In the experiment with vernier callipers least count 0.1 mm, when the two jaws are joined together the zero of vernier scale lies right to the zero of main scale and 8th division of vern

In the experiment with vernier callipers least count 0.1 mm, when the two jaws are joined together the zero of vernier scale lies right to the zero of main scale and 8th division of vernier scale coincides with the main scale division, During measurement, the diameter of the spherical bob. The zero of one vernier scale lies in between 3.2 cm and 3.3 cm marks. 5th division of vernier scale coincides with main scale division. Find the diameter of bob is:

Option: 1

3.17 cm


Option: 2

3.19 cm


Option: 3

3.08 cm


Option: 4

3.16 cm


Answers (1)

best_answer

Least count of vernier calliper LC = 0.1 mm

\begin{aligned} \text { zero error } & =\theta \times L C=8 \times 0.1 \\ & =0.8 \mathrm{~mm} \end{aligned}

 

\begin{aligned} \text { Positive error } & =\text { main\, scale Reading }+V S R \times L C & - \text { zero error } \\ = & {[32+0.1 \times 5]-0.8 } \\ & =31.7 \mathrm{~mm}=3.17 \mathrm{~cm} \end{aligned}

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Anam Khan

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