1.
EXPlain a
method
to find the
thickness of thin
Coin using a ha
Screw gauge
Answers
Answer:
Screw gauge is an instrument used to accurately measure the thickness of a sheet of metal. It is comprised of a U-shaped frame fitted to a screwed spindle which is attached to a thimble. A scale graduated in mm is engraved parallel to the axis of the thimble. This is known as the pitch scale. The head of the screw consists of a rachet that avoids undue tightening of the screw. On the thimble, there is a circular scale known as the head scale which is divided into 50 to 100 equal parts. The pitch of the screw is the distance moved by the spindle per revolution. The distance moved by the tip of the screw when the screw is turned through 1 division of the head scale is known as the least count.
Formula:
PitchoftheScrew=DistancemovedbythescrewNooffullrotationsgiven
LeastCount=PitchTotalNumberofDivisionsontheCircularScale
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