Question

screw gauge experiment ​

Answer 1

Explanation:

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Answer 2

Explanation:

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Aim

To measure diameter of a given wire using screw gauge.

Materials Required

Screw gauge

Wire

Half-meter scale

Magnifying glass

Theory

What is least count?

Least count is given as:

Leastcount=pitchno.ofdivisionsoncircularscale

If a screw gauge has a pitch of 1 mm and 100 divisions on the circular scale then the least count is given as:

Leastcount=1mm100=0.01mm

How to take the linear scale reading?

Linear scale reading is taken by noting the mark on the linear scale which is close to the edge of the circular scale.

How to take circular scale reading?

Circular scale reading is taken by noting the division on the circular scale that coincides with the main scale reading.