JEE Mains · Physics · STD 11 - 1. units,dimensions and measurement
In a vernier calliper, when both jaws touch each other, zero of the vernier scale shifts towards left and its \(4^{\text {th }}\) division coincides exactly with a certain division on main scale. If \(50\) vernier scale divisions equal to \(49\) main scale divisions and zero error in the instrument is \(0.04 \mathrm{~mm}\) then how many main scale divisions are there in \(1 \mathrm{~cm}\) ?
- A \(40\)
- B \(5\)
- C \(20\)
- D \(10\)
Answer & Solution
Correct Answer
(C) \(20\)
Step-by-step Solution
Detailed explanation
\(4^{\text {th }}\) division coincides with \(3^{\text {rd }}\) division then \( 0.004 \mathrm{~cm}=4 \mathrm{VSD}-3 \mathrm{MSD}\) \(49 \mathrm{MSD}=50 \mathrm{VSD}\) \(1 \mathrm{MSD}=\frac{1}{\mathrm{~N}} \mathrm{~cm}\)…
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