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Question

The L.C of a vernier callipers is 0.01 cm and its zero error is - 0.03 cm while measuring the length of a rod. The main scale reading is 4.6 cm and the sixth division on the vernier is in line with a marking on the main scale, then what will be the length of the rod ?

A
4.95 cm
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B
4.69 cm
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C
5.03 cm
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D
4.99 cm
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Solution

The correct option is B 4.69 cm
L.C=0.01 cm zero error =0.03 cm MSR =4.6 cm coinciding division =6 VSR =LC×6=0.06 cm

Final reading =MSR+VSR zero error =4.6+0.06+0.03=4.69

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