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XI Precautions (if any), li Only screw head should be rotated and the sleeve should not be rotated to, avoid excess pressure. ite i, 2) The screw should be always rotated in one direction to avoid backslash error., XIL Actual procedure followed, XH, , XV, , , , Observations and Calculations, , Observations, , 1. Pitch of the screw = Distance travelled by the screw on main scale in one rotation =, p=.9+1....cm., , 2. Total number of divisions on circular scale =n = 90..., , 3. Least count of micrometer screw gauge = p/n=...'4cm, , 4. Zero error correction, z = Coinciding circular division with axial line (C.S.D.) x L.C., , , , , , , , , , MAHARASHTRA STATE BOARD OF TECHNICAL EDUCATION. on
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Basic Science Physics (22102), , , , ae, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , d thickness, ' surement of diameter an, Table 1: Measur' = mR a, CSR= Wy = Average, MSR. licepi| coe ony TR+| reading |, Object Dimension cm cs! LC) CSR) (2) cm a, cm cm cm, él ;, thee [44 [0044 0644 [0614, Ae Diameter love |b [O204S or 64s [0.615 © -6|, Sphere (D,) 2 |or 6 ; Beet 1, "|G los [os loo 4 [9-63! |, ‘ |, 110-6 [20 ]O.095_ [0°69 |066, Block Thickness [> iy7G\|BO[/0'O8 |o 68 [ours oe 6S im, 0 (0-6 25 19.9095 16469 lobes, ilo. 2 142 |0:942 O:242/0.212, aun metallic Diameter 216-2150 loos | 6:25 jJo/zr ©.127 |, Dy |, ved 3 AE: BiO! | NO ONG) (aaa ae |Cuzs) |, :, XVI Results |, ie Average diameter of metallic sphere = D,= O:$b: cm. *, 2) Average thickness of block = t=..9 S m, 3) Average diameter of thin metallic Dy= 9.22% cm, , XVII Interpretation of results, , , , , , , , , , , , , , , , , , , , Sr. | Gauge of | Standard | Measured | Measured Error=Experimental * Value- |, , No | metallic | Value Value (cm) | Value (m) Standard Value }, wire (cm) |, , 1 16 0.129 ODE 2.2% 5 2xiVor>, , aes 7: 0.115 O13 113 -2x)o>, , 3. [18 0.102 19595 [455 0-898, , , , , , , , , , XVIII Conclusions and Recommendations (if any), , , , XIX Practical Related Questions, , Note: Below given are few sample questions for reference. Teachers must design more, such questions so as to ensure the achievement of identified CO., , 1. Is the micrometer screw gauge used for measurement of inner diameter of tube?, , 2. Name two main parts of a screw-gauge?, , 3. Write the steps taken to avoid backlash error,, , , , , , MAHARASHTRA STATE BOARD OF TECHNICAL EDUCATION, , 212 |
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asic Seience Physics (22102), used in experiment., , i screw gauge eget iaay, n micrometer serew BUN isions and its pitch is | mm., , 4, State the range of giver contains 100 divi, , 5, The circular scale of a screw gauge, tive the least c e sc ec. ; ., Give the least count of the screw gaug riaciies et acate'iv207mm. If ba, , 6. In ten rotatioris of the screw, distance trave, , i i ter screw gauge., P divisi sire! sc (), Find L.C, of microme gauge., ofedivisions op clrgias erat and 50 circular scale divisions is used, , 7. A micrometer screw gauge of pitch 0.5 nari diagram below shows part of the, , to measure the thickness of a glass plate. 2 . iz, micrometer gauge. What is the thickness of the glass Placer the micrometer. isin, the position shown below with the plate in between its Jaws: intent?, 8. Name the part of the screw gauge, which prevents It from Une aes t, 9, Out of the following instrument which gives maximum accuracy in measuremen, , Give reasons for your answer, A) Steel ruler, B) Vernier caliper. C) Micrometer screw gauge., , XX ___ References / Suggestions for further Reading _, a. _ http://amrita.olabs.edu.in/?sub=1 &brch=5&sim=1 56&ent=470., , b. https://www.youtube.com/watch?v=qCcZebTB7wk. r, c. _www,phy.uct.ac.za/courses/phylab1., , XXI__ Assessment Scheme, , Process related with Weightage (Criteria considered):, , , , , , , , , , , , , , , , S.No. Performance Indicators Weightage, 1 Handling of the instrument > 10, 2 Determination of Least Count(L.C.)of instrument _| 10, 3 Determination of zero error of instrument 10., 4 Fixing of object 10, 5 Proper measurement 10, 6 Calculation of parameters concerned 10, , , , , , Product related with Weightage, , , , , , , , , , , , Weightage, , , , 10, , , , 10, , , , 10, , , , 10, , , , , , , , , , MAHARASHTRA STATE BOARD OF TECHNICAL EDUCATION 212
