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Q.

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

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a

0.026 cm

b

0.016 m

c

0.052 cm

d

0.062 m

answer is C.

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Detailed Solution

Diameter of wire = MSR + CSR × LCGiven main scale reading (MSR) = 0 mmCircular scale reading = 52Least  count=Value of  1  main  scale  divisionTotal  divisions on  circular  scaleLC=0+52×1100= 0.52 mm= 0.052 cm
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A screw gauge gives the following reading, when used to measure the diameter of a wire. Main scale reading : 0 mmCircular scale reading : 52 divisionsGiven that 1 mm on main scale corresponds to 100 divisions of the circular scaleThe diameter of the wire from the above data is