Verified Solution • 2025–26 Session moderate

QJEEM21Ph4342: JEE Main 2021 Physics - Class 11 JEEM21Ph4342 Solution: The vernier scale used for measurement has a positive zero…

The vernier scale used for measurement has a positive zero error of 0.2 mm. If while taking a measurement it was noted that '0' on the vernier scale lies between 8.5 cm and 8.6 cm, vernier coincidence is 6, then the correct value of measurement is ___________ cm. (least count = 0.01 cm)

Multiple Choice Options

  • A 8.58 cm
  • B 8.54 cm
  • C 8.56 cm
  • D 8.36 cm

Step-by-Step Verified Solution

Reading = MSR + VSD ×\times LC −- zero error

Reading = 8.5 + (0.1)×610−0.210=8.54{{(0.1) \times 6} \over {10}} - {{0.2} \over {10}} = 8.54 cm

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