Question

The figure below shows the final reading on a vernier caliper with a zero error of -0.3 mm. What is the actual measurement? 10 cm 11 cm and lent ul | 0 10 b. 9.99 cm a. 10.32 cm c. 10.05 cm d. 9.72 cm.
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Answer 1

Explanation:

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Answer 2

Answer:

Explanation:

Least count is the least measure that a device can be used to measure.

Least count of the vernier calipers is given by

$\mbox{L.C}=\dfrac{\mbox{Value of 1 MSD}}{\mbox{Number of VSD} }$

       $=\dfrac{\mbox{ 1 mm}}{\mbox{10} }=0.1mm=0.01cm$

From the figure,

the main scale reading,  $\mbox{MSR}= 10\mbox{cm}$

the vernier scale reading, $\mbox{VSR}= 2$

The reading recorded by the vernier calipers is

$\mbox{Main scale reading} +\mbox{least count}\times\mbox{veriner scale reading}$

Substituting the values, the reading is

$\mbox{100} +\mbox{0.1}\times\mbox{2}$

$=\mbox{100} +\mbox{0.2}=100.2\mbox{mm}$

A negative zero error in vernier caliper is when the zero of the vernier comes to left of the zero of the main scale, when both the jaws are in contact with each other.

Given the zero error of vernier caliper is -0.3mm

Then the corrected reading is observed reading minus zero error

$\implies 100.2-(-0.3)=100.5mm=10.05cm$  

Therefore, the actual measurement is 10.05cm.

So, the correct option is c.

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