NEET 2018 Physics question
A student measured the diameter of a small steel ball using a screw gauge of least count . 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 , the correct diameter of the ball is
Answer: (4)
Solution
Observed reading = MSR + CSR LC . Correct reading = observed reading zero error (option 4). A
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