Two spherometers A and B have the same pitch. A has 100 division on periphery of its circular disc and B has 200 division on periphery of its circular disc. Then

Options

A. Both A and B have same least count
B. L.C. of A is twice the L.C. of B
C. L.C. of A is half the L.C. of B
D. Nothing can be said

Answer

(b)

Explanation

As `L.C. = ("pitch")/("no. of divs. On C.S")`
and B has twice the number of division on A,
:. L.C. of A is twice the L.C. of B