Question

Previous Years Questions
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
(1) 0.521 cm
(2) 0.525 cm
(3) 0.529 cm
(4) 0.053 cm​

Answer 1

Answer:

without zero error the ans is 0.525

and after correcting the error the answer is 0.521