Categories: Physics JAMB

The inner diameter of a test tube can be measured accurately using a?

A. micrometer screw gauge
B. pair of dividers
C. meter rule
D. pair of vernier calipers

Correct Answer:

Option D = pair of vernier calipers

Explanation

The basic difference between screw gauge and vernier caliper is that screw gauge is used to measure only external measurement while vernier caliper is used to measure external as well as internal measurement. The least count of vernier caliper is 0.01mm while the least count of screw gauge is 0.001 mm

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