General Physics Question 21

Question 21

  1. N divisions on the main scale of a vernier calipers coincide with (N+1) divisions on the vernier scale. If each division on the main scale is of a units, determine the least count of instrument.

(2003,2M)

constant. The velocity v of any point of the surface of the expanding sphere is proportional to

(2017 Adv.) (a) R (b) 1R (c) R3 (d) R23

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Answer:

Correct Answer: 22. aN+1

Solution:

  1. (N+1) divisions on the vernier scale

=N divisions on main scale 

1 division on vernier scale

=NN+1 divisions on main scale 

Each division on the main scale is of a units. 1 division on vernier scale =NN+1a units =a (say)

Least count =1 main scale division -1 vernier scale division

=aa=aNN+1a=aN+1



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