Question

In an experiment the height of a small object is
measured by a Vernier Calliper having least
count 0.01 cm is found to be 7.38 cm, then the
actual height of object may be :-
(1) 7.40 cm
(2) 7.3942 cm
(3) 7.3792 cm (4) 7.3882 cm​

Answer 1

Answer:

7.3792 cm can be the actual height of object

Explanation:

Vernier Calliper having least count 0.01 cm

7.40 cm  will be read as 7.40 cm only

7.3942 cm  will be read as  7.39 cm  ( 42 after 9 will be neglected)

7.3792  will be read as 7.38 cm  ( 2 after 9 will be neglected , but 9 ≥ 5 so

7 before 9 will be rounded up to 8)

7.3882  will be read as 7.39 cm ( 2 after 8 will be neglected , but 8 ≥ 5 so

8 before 8 will be rounded up to 9)

As vernier reading is 7.38 cm

so 7.3792 cm can be the actual height of object