JEE Main · 29 July 2022, Shift 1 · Q50

In an experiment to find out the diameter of wire using screw gauge, the following observations were noted: (A) Screw moves 0.5 mm on main scale in…

In an experiment to find out the diameter of wire using screw gauge, the following observations were noted :

(A)

Screw moves $\displaystyle 0.5$ mm on main scale in one complete rotation

(B)

Total divisions on circular scale $\displaystyle =50$

(C)

Main scale reading is $\displaystyle 2.5$ mm

(D)

$\displaystyle 45^{\text {th }}$ division of circular scale is in the pitch line

(E)

Instrument has $\displaystyle 0.03$ mm negative error

(E)

Then the diameter of wire is :