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What is the use of thin strip at the bac...

What is the use of thin strip at the back of vernier calliper ?

A

for measuring internal diameter of a beacker

B

for measuring depth of a cylinder

C

for measurig dimeter of a hollow cylinder

D

none of these

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The correct Answer is:
(b)
The striop at the back of vernier calliper is used for measuring depth of a cylinder.
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