1. on its outer spindle with a relative motion between the vernier and graduated scale of lower plate
  2. on its outer spindle without a relative motion between the vernier and gra-duated scale of lower plate
  3. on its inner spindle with a relative motion between the vernier and the graduated scale of lower plate
  4. on its inner spindle without a relative motion between the vernier and the graduated scale of lower plate
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1 Answers

Answer: Option 3

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