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Q.

A screw gauge gives the following readings when used to measure the diameter of a wire
Main scale reading : 0 mm
Circular scale reading : 52 divisions
Given that 1 mm on main scale corresponds to 100 divisions on the circular scale. The diameter of the wire from the above data is :

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a

0.026 cm

b

0.052 cm

c

0.52 cm

d

0.26 cm

answer is A.

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Detailed Solution

Least count =1100=0.01mm
Diameter of the wire
= CSR x LC
= 52 x 0.01mm
= 0.52mm
d = 0.052cm

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