1. The diagram shows part of vernier scale on a pair
of calipers. Which reading is correct?
(Least count = .01 cm)
(1) 2.74 cm
(2) 3.10 cm
(3) 3.26 cm
(4) 3.64 cm
Answers
Answer:
2.74 is the answer
Explanation:
VS - Vernier scale
MS - Main scale
LC - least count
Now,
VS= 4MS= 2.7
MS + VS × LC
= 2.7 + 0.01×4
= 2.74 cm
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Answer:
2.74 cm reading is correct.
Explanation:
Step 1: Applying the zero correction, calculate the total reading using the equation TR = MSR+VSR = N+(n x L.C). Take the average of the various diameter values and display it in the results using the appropriate unit.
Given that:
10VSD =9MSD
1VSD =0.9mSD
Also,
Step 2: From the given diagram
It is important to record the number (n) of circular scale divisions that fall on the principal scale line. Reading the circular scale with the least count, (C.S.R.)-n. Combine the MSR and CSR to get readings. Subtract the zero error from the above value to obtain the accurate reading.
1MSD=0.1 cm
1 VSD =0.9×0.1 cm
=0.09 cm
=1mSD−1VSD
=0.1−0.09
=0.01 cm
Step 3: Reading =MSR+VSR
=2.7 cm+(4×0.01)
=2.74 cm
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