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The vernier scale of a travelling micros...

The vernier scale of a travelling microscope has 50 divisions which coincide with 49 main scale divisions. If each main scale division is 0.5 mm, then the least count of the microscope is

A

0.01 cm

B

0.5 mm

C

0.01 mm

D

0.5 cm

Text Solution

Verified by Experts

The correct Answer is:
C
1 MSD=0.5mm
50VSD=49MSD
`1VSD=(49)/(50)MSD`
Least count `=1MSD-1VSD`
`=1MSD-(49)/(50)MSD=(1)/(50)MSD=(1)/(50)xx0.5mm=0.01mm`
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