The vernier scale used for measurement has a positive zero error … - Vidyadip

MCQ

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 $=0.01\, cm )$

A
$8.36$
✓
$8.54$
C
$8.58$
D
$8.56$

✓

Answer

Correct option: B.

$8.54$

b
Positive zero error $=0.2 mm$

Main scale reading $=8.5 cm$

Vernier scale reading $=6 \times 0.01=0.06 cm$

Final reading $=8.5+0.06-0.02=8.54 cm$

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