Question

1.
A student measured the diameter of a small
steel ball using a screw gauge of least count
0.001 cm. The main scale reading is 5 mm and
zero of circular scale division coincides with
25 divisions above the reference level. If screw
gauge has a zero error of -0.004 cm, the correct
diameter of the ball is
(a) 0.521 cm
(b) 0.525 cm
(C) 0.053 cm
(d) 0.529 cm
(NEET 2018)​

Answer 1

Answer:

D) 0.529

Explanation:

MSR+ ( LC×CSD) + ZE