Question

6.
In Fortin's barometer 25 vernier scale divisions coincide with 24 divisions of main scale and there are
20 divisions in one centimetre. To measure atmospheric pressure the main scale reading was 75.35
cm and 12th vernier division coincides with one of main scale division. The correct value of pressure is-
(A) 75.362 cm
(B) 75.374 cm (C) 75.37 cm
(D) 75.36 cm
The main scale of a vernier callipers reads in millimeter and its vernier is divided into 10 divisions whics
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Answer 1

Answer:

A Fortin's barometer has a main scale and a vernier scale to measure the atmospheric pressure. The main scale coincide with 50 vernier divisions, find the least count of the instrument in Pa. (Given pressure exerted by 76 cm column of mercury = 10^(5) Pa)

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