Question

A student, while performing an experiment using a screw gauge, observes that the screw moves 3 mm on the pitch scale when 6 complete rotations of the head scale are given. What is the pitch of the screw gauge?

• A. 0.036 cm
• B. 0.36 cm
• C. 0.05 cm
• D. 0.5 cm

Answer 1

The correct option is C

0.05 cm

We know that, $\text{Pitch}=\frac{\text{Distance moved on the pitch scale}}{\text{No. of rotations of head scale}}$
Here, Distance moved on pitch scale for 6 rotations of the head scale = 3 mm
Therefore, $\text{Pitch}=\frac{3mm}{6}=0.5mm=0.05cm.$