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JEE Main
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Physics
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Experimental Physics

JEE Main · 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

2020\left(\text{VRS}\right) =19 (MSR)<br/><br/>\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=\text{MSR} =2 mm
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