The vernier scale used for measurement has a positive zero error of $0 . 2mm .$ If while taking a measurement it was noted that $0$ on the vernier scale lies between $8 . 5cm$ and $8 . 6cm$ . Vernier coincidence is $6,$ then the correct value of measurement is $cm .$
(least count $= 0 . 01cm$ )

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The vernier scale used for measurement has a positive zero error of $0 . 2mm .$ If while taking a measurement it was noted that $0$ on the vernier scale lies between $8 . 5cm$ and $8 . 6cm$ . Vernier coincidence is $6,$ then the correct value of measurement is $cm .$

(least count $= 0 . 01cm$ )

Quantrex Academy · Accepted Answer

Correct answer: B. 8 . 54cm

Positive zero error = 0 . 2mm Main scale reading = 8 . 5cm Vernier scale reading = 6 × 0 . 01 = 0 . 06cm Final reading = 8 . 5 + 0 . 06 - 0 . 02 = 8 . 54cm

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