A) \[0.0430cm\]
B) \[0.3150cm\]
C) \[0.4300cm\]
D) \[0.2150cm\]
Correct Answer: D
Solution :
| [d] In one rotation scale moves |
| \[\frac{0.25}{5}=0.05cm\] |
| Least count \[=0.05\times {{10}^{-2}}cm\] |
| For 4 main scale division \[=4\times 0.05=0.2cm\] |
| For circular scale division |
| \[=30\times 0.05\times {{10}^{-2}}=1.5\times {{10}^{-2}}cm\] |
| Thickness of wire\[=0.2+0.015=0.2150cm\] |
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