the least count of the main scale of a screw gauge is 1 m. the minimum number of divisions on its circular scale required to measure 5`mu m` diameter of a wire is :

Options

A. 50
B. 500
C. 200
D. 100

Answer

C

Explanation

Least count of screw gauge `=("pitch")/("No. of division on vemier scale") rArr 5 mu m=("1 m m)/(N)`.
`N=200`.