This document outlines the lab journal for an Applied Physics Lab course (GSL-114) conducted in Fall 2019, detailing various tasks aimed at familiarizing students with electrical devices and fundamental measurements using tools like vernier calipers and screw gauges. It includes specific objectives for measuring dimensions and calculating densities of objects, alongside a grading sheet for assessment. Additionally, it provides theoretical overviews and precautions for using the featured tools effectively during laboratory tasks.

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