A vernier callipers is constructed by us...

A vernier callipers is constructed by using two identical triangular wedges each of angle of inclination `alpha=60^(@)`. Assume that one division is equivalent to 1mm. While measuring length AB, the reading of lower wedge is 8th mark and 7th mark of upper wedge coincide with. a particular mark of lower wedge. Mark the correct option (s)

Least count is 1 mm

Least count is `0.1` mm

Length AB is 15 mm

Length AB is 1.5 mm

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The correct Answer is:

A, C

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