The varnier scale used for measurement  has a positive zero error of 2.0 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)  
Option: 1 8.56 cm
 
Option: 2 8.54 cm
Option: 3 8.58 cm  
Option: 4 8.36 cm

Answers (1)

Positive zero error =0.2 mm

Main scale reading =8.5 cm

Vernier scale reading =6 \times 0.01=0.06 \mathrm{~cm}

Final reading =8.5+0.06-0.02=8.54 cm

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