NEET 2018 Physics Screw Gauge MCQ Question
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 o.004 cm, the correct diameter of the ball is
0.521 cm
0.525 cm
0.053 cm
0.529 cm
Correct Answer
Detailed Explanation
The correct diameter is calculated by adding the main scale reading and the circular scale reading, then adjusting for zero error.
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