To measure the volume of a cylinderical wire, its
diameter is measured by a screw gauge and is
found to be 1.25 mm, and its length is measured
with a vernier caliper and is found to be 5.50
cm. The least count of the screw gauge is 0.01
mm, and that of the vernier caliper is 0.01 cm.
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Answer:
Volume of cylinder V=πr
2
L
∴ Percentage error in volume
⇒
V
ΔV
×100=
r
2Δr
×100+
l
Δl
×100
=2(
2.0
0.01
)×100+
5.0
0.1
×100
=(1+2)=3 .
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