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Standard VII
Physics
Density
The numerical...
Question
The numerical value of density in SI is n times its value in cgs system. The value of n is
A
10
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B
100
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C
1000
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D
1
1000
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Solution
The correct option is
D
1
1000
Si unit of density is
k
g
/
m
3
and its CGS unit is
g
m
/
c
m
3
We know that
1
k
g
=
10
3
g
m
and
1
m
=
10
2
c
m
Thus ratio of SI to CGS unit
k
g
/
m
3
g
m
/
c
m
3
=
10
3
g
m
/
(
10
2
c
m
)
3
g
m
/
c
m
3
=
1
1000
Thus the value of n is
10
−
3
.
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0
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