NEET Solved Paper 2018 Question 37
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 of -0.004 cm, the correct diameter of the ball is [NEET - 2018]
Options:
A) 0.053 cm
B) 0.525 cm
C) 0.521 cm
D) 0.529 cm
Show Answer
Answer:
Correct Answer: D
Solution:
Diameter of the ball $ \text{=MSR+CSR }\times\text{ (Least count)–Zero error} $
$ \text{=0}\text{.5 cm+25 }\times\text{ 0}\text{.001–(–0}\text{.004)} $
$ =0.5+0.025+0.004 $ $ \text{=0}\text{.529 cm} $
