The circular scale of a screw gauge has 50 divisions and pitch of 0.5 mm. Find the diameter of sphere. Main scale reading is 2.

Question

The circular scale of a screw gauge has 50 divisions and pitch of 0.5 mm. Find the diameter of sphere. Main scale reading is 2. (A) 1.2 mm (B) 1.25 mm (C) 2.20 mm (D) 2.25 mm

Tardigrade Admin · Accepted Answer

Least count (LC) = ( textPitch/ textNumber of divisions on circular scale ) = (0.5/50)=0.01 mm Now, diameter of ball = (2 × 0.5 mm)+(25-5)(0.01)=1.2 mm

Q. The circular scale of a screw gauge has $50$ divisions and pitch of $0.5 mm$ . Find the diameter of sphere. Main scale reading is $2$ .

1.2 mm

1.25 mm

2.20 mm

2.25 mm

Least count (LC) $= \frac{Pitch}{Number of divisions on circular scale}$
$= \frac{0.5}{50} = 0.01 mm$
Now, diameter of ball
$= (2 \times 0.5 mm) + (25 - 5) (0.01) = 1.2 mm$

Q. The circular scale of a screw gauge has 50 divisions and pitch of 0.5mm. Find the diameter of sphere. Main scale reading is 2.