Page 9 - 9-phy-1 Measurements
P. 9
Least count (LC) = ……………..mm
Zero error = …………….mm
Zero correction (ZC) = (±).......................mm
DO YOU KNOW? No. of Main Division of CS Fraction to be Observed Corrected thickness
Obs. scale coinciding with t = Y ± ZC
Micrometer is commonly Reading the datum line added thickness
used to measure (mm)
thickness of metallic M n X = n ×LC Y= M+X
sheets and wires to check (mm)
their standard gauges. (mm) (mm)
1. t 1 =
2. t 2 =
3. t 3 =
Mean thickness t = t1 + t 2 + t 3
3
Thickness of the metal strip is _________ mm.
1. A student uses a screw gauge to 35
determine the thickness of a sheet of 30
paper. The student folds the paper three 25
times and measures the total thickness 0 20
of the folded sheet. Assume that there 15
is no zero error in the screw gauge. The
reading of screw gauge is shown in Fig Fig. 1.3.3
1.3.3. Find the thickness of the sheet.
Show your working clearly.
9
Zero error = …………….mm
Zero correction (ZC) = (±).......................mm
DO YOU KNOW? No. of Main Division of CS Fraction to be Observed Corrected thickness
Obs. scale coinciding with t = Y ± ZC
Micrometer is commonly Reading the datum line added thickness
used to measure (mm)
thickness of metallic M n X = n ×LC Y= M+X
sheets and wires to check (mm)
their standard gauges. (mm) (mm)
1. t 1 =
2. t 2 =
3. t 3 =
Mean thickness t = t1 + t 2 + t 3
3
Thickness of the metal strip is _________ mm.
1. A student uses a screw gauge to 35
determine the thickness of a sheet of 30
paper. The student folds the paper three 25
times and measures the total thickness 0 20
of the folded sheet. Assume that there 15
is no zero error in the screw gauge. The
reading of screw gauge is shown in Fig Fig. 1.3.3
1.3.3. Find the thickness of the sheet.
Show your working clearly.
9
