these slides are the book of physics from department of computer science these slides are the questions about the screw gauge and vernier caliper for practicing.

1. DepartmentofComputerSciences
LabJournal1
(Fall2019)
Course: AppliedPhysicsLab Date:
CourseCode: GSL-114 MaxMarks:20
Faculty’sName: FatimaSiddiqui LabEngineer:Mr.ShoaibKhan
Name: EnrollNo:
Objective(s):
• Tofamiliarizestudentswiththeelectricaldevicesusedinbasicelectronicslab
LabTasks:
Task1:Measurediameterofaspherical/cylindricalrod.
Task2:Measurethediameterofawire.
Task3:Measurethediameterofpencap.
Task4:Measuretheaveragediameterofpen.
Task5:Measurethedepthpencap.
Task6:Measuretheaveragevolumeofpen.
Task7:Measurethevolumeofrod.

2. LabGradingSheet:
Task
Max Obtained
Comments(ifany)
Marks Marks
1 10
2 10
3 10
4 10
5. 10
6. 10
7. 10
Total 20 Signature
Note:AttemptalltasksandgetthemcheckedbyyourLabInstructor

3. LabManualAppliedPhysics|GSL-
114
Lab1:IntroductiontoVernierCaliper&ScrewGauge
Objective(s):
UseofVernierCalipersto
•Measurediameterofasmallspherical/cylindricalbody
•Measurethedimensionsofagivenregularbodyofknownmassand
hencetodetermineitsdensity
•Measuretheinternaldiameteranddepthofagivencylindricalobject
likebeaker/glass/calorimeterandhencetocalculateitsvolume
Tool(s)used:
• Verniercalipers
• Sphericalbody,suchasapendulumboboraglassmarble
• Rectangularblockofknownmassandcylindrical
objectlikeabeaker/glass/calorimeter
TheoryOverview:
AVernierCaliperhastwoscales-onemainscaleandaVernierscale,which
slidesalongthemainscale.ThemainscaleandVernierscalearedividedinto
smalldivisionsthoughofdifferentmagnitudes.

4. LabManualAppliedPhysics|GSL-114
Themainscaleisgraduatedincmandmm.Ithastwofixedjaws,AandC,
projectedatrightanglestothescale.TheslidingVernierscalehasjaws(B,D)
projectingatrightanglestoitandalsothemainscaleandametallicstrip(N).
ThezeroofmainscaleandVernierscalecoincidewhenthejawsaremadeto
toucheachother.Thejawsandmetallicstriparedesignedtomeasurethe
distance/diameterofobjects.KnobPisusedtoslidetheVernierscaleonthe
mainscale.ScrewSisusedtofixtheVernierscaleatadesiredposition.
1. Theleastcountofacommonscaleis1mm.Itisdifficulttofurther
subdivideittoimprovetheleastcountofthescale.AVernierscale
enablesthistobeachieved.
Principle
Thedifferenceinthemagnitudeofonemainscaledivision(M.S.D.)andone
Vernierscaledivision(V.S.D.)iscalledtheleastcountoftheinstrument,as
itisthesmallestdistancethatcanbemeasuredusingtheinstrument.
nV.S.D.=(n–1)M.S.D.

5. LabManualAppliedPhysics|GSL-
114
ObservationsTable
Calculations
Measurementofdiameterofthesphere/
cylindricalbodyMeandiameter=3D1+D2+D3=
cm
Correcteddiameterofthegivenbody,D=Do-(±e)
a)Measurementoflength,breadthandheightofthe
rectangularblockMeanlength3=L1+L2+L3=cm
b)Correcteddiameterofthegivenbody,L=Lo-(±e)
Precautions
IftheVernierscaleisnotslidingsmoothlyoverthemainscale,applymachine
oil/grease.

6. IntroductiontoScrewGuage
Objective(s):
“Tomeasurediameterofagivenwireusingascrewgauge”
Tool(s)used:
• Screwgauge
• Wire
TheoryOverview:
• IfwiththewirebetweenplanefacesAandB,theedgeofthecaplies
aheadofN
th
divisionoflinearscale.
• Then,linearscalereading(L.S.R.)=N
• Ifnthdivisionofcircularscaleliesoverreferenceline.
• Then,circularscalereading(C.S.R.)=nx(L.C.)(L.C.isleastcountof
screwgauge)
• Totalreading(T.R)=L.S.R.+C.S.R.=N+nx(L.C.).

7. LabManualAppliedPhysics|GSL-114
Calculations:
Meandiameter= mm