Creative teaching vernier principle revisited
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Creative Teaching
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Vernier Caliper Principle - Revisited
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A
B
X
X = A – B = Least Count
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Why?9 Divisions =10 Divisions
(On Main Scale) (On Vernier Scale)
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Why Not?8 = 10
Why not?6 = 10
Why not?7 = 10
(On Main Scale) (On Vernier Scale)
(On Main Scale) (On Vernier Scale)
(On Main Scale) (On Vernier Scale)
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Let us solve some examples ……
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1 2 3 4 5 60.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
N+3
LC(mm)
N+1 N+2 N+4 N+5 N+6
N=9
N=19
N=39N=49
N=79
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Conclusions:
1. N+1 = N principle gives minimum least count2. Increase in N gives minimum least count3. Students will enjoy the meaning behind the
principle4. Students start exploring the engineering
principles without blindly accepting any concept
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10 Divisions on Main Scale
9 Divisions on Vernier Scale
Question ?If by mistake 10 divisions on Main Scale are made equal to 9 divisions on Vernier Scale, then what is the least count? Is it possible to use the instrument? If it is usable, HOW?
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Thank You
Dr.P.Madar ValliProfessorIndustrial Engineering DepartmentGIT,Gitam UniversityVisakhapatnam,India