Published by:
CGP EDU Academic Team
Published on: August 23, 2026
In an experiment to find out the diameter of wire using screw gauge, the following observation were noted:
A
Screw moves 
on main scale in one complete rotation 
on main scale in one complete rotation
B
Total divisions on circular scale 
C
Main scale reading is 
D
division of circular scale is in the pitch line (E) Instrument has 
negative error Then the diameter of wire is: 
Text Solution
Verified by ExpertsThe correct answer is:
C
Diameter reading 
MSR 
zero error
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