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Class 11 NEET Physics Physical World, Units and Measurements
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© examsnet.com
Question : 32
Total: 67
The density of a material in CGS system of units is
4
g
∕
c
m
3
In a system of units in which unit of length is 10 cm and unit of mass is 100 g, the value of density of material will be
(2011 Mains)
0.04
0.4
40
400
Validate
Solution:
ln
C
G
S
,
d
=
4
g
∕
c
m
3
If unit of mass is
100
g
,
4
g
mass in new units is
4
100
units
and unit of distance is
10
c
m
,
1
c
m
in new units is
1
10
units
So, density
=
4
(
g
100
)
(
1
10
c
m
)
3
=
(
4
100
)
(
1
10
)
3
=
40
units
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