Question
Physics Question on Units, Dimensions and Measurements
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
0.521cm
B
0.053cm
C
0.525cm
D
0.529cm
Answer
0.521cm
Explanation
Solution
The correct option is (A): 0.521cm