Two conducting spheres of radii $9 \mathrm{~cm}$ and $1 \mathrm{~cm}$ are separated by a distance of $20…

Two conducting spheres of radii $9 \mathrm{~cm}$ and $1 \mathrm{~cm}$ are separated by a distance of $20 \mathrm{~cm}$ in free space. If the spheres are charged to same potential of $10 \mathrm{~V}$ each, the force of repulsion between them is
  1. $\frac{4}{9} \times 10^{-9} \mathrm{~N}$
  2. $\frac{10^{-9}}{4} \mathrm{~N}$
  3. $\frac{10^{-9}}{3} \mathrm{~N}$
  4. $4 \times 10^{-9} \mathrm{~N}$

Solution

No solution. Refer to answer key.

Asked in: AP EAMCET 2017 (25 Apr Shift 2)

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