Question

what is the use of a narrow tube in a vernier caliper?

Answer 1

Explanation:

These projecting jaws are used to measure the internal diameters of the tubes. By using normal scale a minimum length of 1 mm can be measured. But least count of vernier is less than 1 mm.

Answer 2

Answer:

These projecting jaws are used to measure the internal diameters of the tubes. 2. By using normal scale a minimum length of 1 mm can be measured. But least count of vernier is less than 1 mm.