The ratio of the forces between two small spheres with constant charges, in air and in a medium of dielectric constant $K$ , is
$1 : K$
$K : 1$
$1 : K^{2}$
$: k 2 : 1$

1 : K

1 : K^{2}

: k 2 : 1

K : 1

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The ratio of the forces between two small spheres with constant charges, in air and in a medium of dielectric constant $K$ , is
$1 : K$
$K : 1$
$1 : K^{2}$
$: k 2 : 1$