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Consider the vernier callipers shown below. The instrument has no zero error. If 1 m . s . d = 1 mm and 7 m . s . d = 8 v . s . d , then what is the length (in mm ) of the rod shown in the figure? [Given; the 4 th v . s . d coincides with m . s . d ]

Correct answer

4.5

Step-by-step solution

7   m . s . d = 8   v . s . d ⇒ 1   v . s . d = 7 8   m . s . d ⇒     L . C = 1 − 7 8   mm = 1 8 mm Were M . S . R = 4   mm V . S . R = 4 value = 4 + 4 1 8   mm = 4 .5    mm

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