Question

a microscope has 30 divisions in vernier scale which is equal to 29 division of main scale if main scale is graduated in cm and each centimeter divided into 20 equal parts. find least count of vernier caliper​

Answer 1

Answer:Width of each division =1 cm×  

10

1

​  

=0.1 cm

Least count of the vernier is equal to the  

10

10−8

​  

 times the value of each division.

⟹ Least count =  

10

2

​  

×0.1 cm=0.02 cm

Explanation:

Answer 2

Answer:

30VSD= 29MSD

1VSD= 29/30MSD

20MSD=1cm

1MSD=1/20 cm

least count = 1MSD - 1 VSD

= 1MSD- 29/30MSD

= 1/30 MSD

=1/30 × 1/20 cm

= 1/600 cm

or1/60 mm