If the force in any medium is 10N and relative permittivity of the medium is 80. Calculate the force in vaccum.
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Answer:
Fe in free surface
Fe=
4πε
0
1
r
2
q
2
=5N
In medium
Fe
m
=
4πε
0
ε
r
1
r
2
q
2
Fe
m
=
ε
r
Fe
=
5
5N
=1N
Explanation:
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