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Smallest division on the main scale of g...

Smallest division on the main scale of given Vernier calipers is 0.5 mm. Vernier scale has 25 divisions and these coincide with 24 main scale divisions. The least count of Vernier callipers is

A

0.001 cm

B

0.002 cm

C

0.01 cm

D

0.02 cm

Text Solution

Verified by Experts

The correct Answer is:
B
25 VSD =24 MSD
`1VSD=(24)/(25)MSD" "......(i)`
The least count of vernier callipers is LC= 1MSD -1 VSD
`=1MSD-(24)/(25)MSD=(1)/(25)MSD" "` (using (i))
AS 1 MSD=0.5 mm (given)
`:.LC=(1)/(25)(0.5mm)=0.02mm=0.002cm`
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