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Physics
Physics
Problem
Two point charges placed at a distance
r
r
r
in air exert a force
F
F
F
on each other. The value of distance
R
R
R
at which they experience force
4
F
4F
4
F
when placed in a medium of dielectric constant
K
=
16
K = 16
K
=
16
is: (a)
r
r
r
(b)
r
/
4
r/4
r
/4
(c)
r
/
8
r/8
r
/8
(d)
2
r
2r
2
r
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