Question

A vernier caliper have 20 divisions on vernier scale and its M.S.D is 0.5 mm. When a hollow cylinder is held by its internal jaws the M.S.R and V.C.D of calipers are 1.2 cm and 10 respectively. Find the radius of cross-section of the cylinder

• A. 0.355 mm
• B. 6.325 mm
• C. 0.6125 mm
• D. 0.6125 cm

Answer 1

The correct option is D 0.6125 cm

$\begin{array}{c}1MSD=0.5mm\\ MSR=1.2cm\\ VCD=10\\ \text{final diameter}=(1.2+VSR)cm\\ \begin{array}{cc}& \\ & \\ \text{final radius}& =(0.6+\frac{VSR}{2})cm\end{array}\end{array}$

$\begin{array}{c}\text{only option (D) fulfills}\\ \text{the above condition.}\end{array}$