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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Physics
Chapter
Experimental Physics

NTA Abhyas 2020 · Physics · Experimental Physics

The distance advanced by the screw of a screw gauge is 2mm in 4...

The distance advanced by the screw of a screw gauge is 2mm2mm in 44 rotations. Its cap is divided into 5050 divisions. There is no zero error. If the screw reads 33 divisions on the main scale and 3232 divisions on the cap, then the diameter (in mmmm) of the wire is

Correct answer

1.82

Step-by-step solution

pitch=2/4pitch = 2 / 4

LC=2/450=.01mmLC = \dfrac{2 / 4}{50} = . 01mm

diameter=3×0.5+32×.01diameter = 3 \times 0.5 + 32 \times . 01

=1.5+.32= 1.5 + . 32

=1.82mm= 1.82mm
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