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# Name the instrument which can measure accurately the diameter of a needle.A) A screw gaugesB) A vernier calliper C) A meter scalesD) All of the above

Last updated date: 13th Jul 2024
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Hint: A measuring instrument is an apparatus for measuring a physical quantity. In the physical sciences, quality assurance, and engineering, measurement is the activity of obtaining and comparing physical quantities of real- world objects and events.

Complete step by step solution:

A screw gauge:
Screw pitch gauges are used as a credential tool in finding the pitch of a thread that is on a screw or in a punctured hole. This tool is used as a correctness measuring instrument, it allows the user to find the profile of the given thread and quickly classify the thread by shape and pitch. This device also saves time, in that it removes the need for the user to measure and calculate the pitch of the threaded item.

A vernier calliper:
A vernier scale is a vision aid to take an precise estimated reading between two outset markings on a parallel scale by using mechanical incorporation; therefore, increasing the resolve and reducing the measurement unpredictability by using vernier acuteness to reduce human estimated error.

Therefore, a screw gauge is the best instrument to measure the diameter of a cylindrical or spherical object that is the diameter of the needle.

Hence, the option (A) a screw gauge is the correct answer.

Note: Measure just the radius of the circle if it is a very large object. The radius is denoted as the distance from the centre to any point on the circle to its end. Multiply the radius by two to obtain the measurement for the diameter.