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Q-The pitch of a screw gauge is 1mm and there are 100 divisions on circular scale..While measuring diameter of a wire,the linear scale reads 1mm and 47th division on circular scale concides with refrence line.The length of wire is 5.6cm.Find the curved surface area(in cmsquare) of the wire in appropriate number of significant figures.

Q-The pitch of a screw gauge is 1mm and there are 100 divisions on circular scale..While measuring diameter of a wire,the linear scale reads 1mm and 47th division on circular scale concides with refrence line.The length of wire is 5.6cm.Find the curved surface area(in cmsquare) of the wire in appropriate number of significant figures. 

Grade:11

1 Answers

Rishabh
19 Points
3 years ago
Least count = Diameter = M. S. + No. of division coinciding with main scale × Least count.= 1mm + 47 × 0.01 mm= 1.47 mm = 0.147 cm.Curved surface area = πd = x 0.147 x 5.6 = 2.6 cm2

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