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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Physics
Chapter
Experimental Physics

NTA Abhyas 2020 · Physics · Experimental Physics

A vernier calliper has 20 divisions on the vernier scale which...

A vernier calliper has 2020 divisions on the vernier scale which coincide with 1919 divisions on the main scale. The least count of the instrument is 0.1mm0. 1mm. The length of one main scale division is

Options

  1. A0.50.5 mm
  2. B11 mm
  3. C22 mm
  4. D0.250.25 mm

Correct answer

C. 22 mm

Step-by-step solution

2020 division on vernier scale =& 1919 division on the main scale

20(VRS)=19(MSR)<br/><br/>20 \left(\text{VRS}\right) =19 \left(\text{MSR}\right)<br /><br /> L.C = MSR−VSR=0.1 mm<br/><br/>\text{MSR} - \text{VSR} = \text{0.1 mm}<br /><br />⇒ MSR - 1920(MSR)=0.1 mm<br/><br/>\dfrac{19}{20}\left(\text{MSR}\right) = \text{0.1 mm}<br /><br />⇒ MSR=2mm\text{MSR} =2 mm
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