Page 6 - 9-phy-1 Measurements

Volume of solid cylinder = p (Radius of cylinder) 2 × (Length of cylinder)
V = pr 2 L

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Volume of solid cylinder = ………………. cm3

1. Following figures are of the same vernier callipers. Fig. 1.1.6 shows
the reading when the jaws are closed while Fig. 1.1.7 shows the reading
when a cylinder is placed between the jaws. Determine the accurate
length of the cylinder?

0 1 2 2 345

Fig. 1.1.6 Fig. 1.1.7

2. A student performed an experiment using different vernier callipers.
Complete the table shown as under.

Instrument has zero error

Diagram Reading with Zero of vernier scale lies at Zero of vernier scale lies at
no zero error right of MS zero and 2nd left of MS zero and 3rd

division of VS coincides division of VS coincides
with a division on MS. with a division on MS.

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3. i) Place five identical pencils side by side and measure their total width
using a metre ruler.
Can you measure the 4.
diameter of a round ii) Calculate the thickness of one pencil. _________________________
marble by using metre
ruler with the same iii) Now find the thickness of a pencil using vernier callipers. _________
accuracy as that of
vernier callipers? If iv) Compare and comment on the two results. _____________________
yes, how?
________________________________________________________.
What is the least count of a clock if it has

i) Hours-hand, minute-hand and seconds-hand _______________

ii) Hours-hand and minute-hand ___________________________

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