Physics 2009 JAMB Past Questions - Question 2: I. Diameter of a small ball bearing .II. Thickness of a piece of paper.III. Diameter of a measuring cylinder.IV. Length of a piece of wire.which of the following can be measured using a micrometer screw gauge ?

Correct Answer

C

Explanation

A micrometer screw gauge is a precision measuring instrument that can be used to measure very small dimensions with high accuracy. Let's consider each of the items you listed and determine whether a micrometer screw gauge can be used to measure them:

I. Diameter of a small ball bearing:
  - Yes, a micrometer screw gauge can be used to measure the diameter of a small ball bearing accurately.

II. Thickness of a piece of paper:
  - Yes, a micrometer screw gauge can be used to measure the thickness of a piece of paper. This is a common application for micrometers.

III. Diameter of a measuring cylinder:
  - Yes, a micrometer screw gauge can be used to measure the diameter of a measuring cylinder. It can measure cylindrical objects with precision.

IV. Length of a piece of wire:
  - No, a micrometer screw gauge is not suitable for measuring the length of a piece of wire. It is designed to measure small linear dimensions or diameters, not lengths.

So, the items that can be measured using a micrometer screw gauge are:
I. Diameter of a small ball bearing.
II. Thickness of a piece of paper.
III. Diameter of a measuring cylinder.