The radius of the metal sphere is 18 nm. The electrical capacity of such a sphere is equal to.

To find out the electrical capacity of the taken metal sphere, we will use the formula: Csph = 4 * Π * ε * ε0 * r.

Const: ε – dielectric constant of the medium in which the taken sphere is located (for example, air and ε = 1, const); ε0 – electrical constant (ε0 = 8.85 * 10-12 F / m, const).

Data: r is the radius of the taken metal sphere (r = 18 nm = 18 * 10-9 m).

Let’s perform the calculation: Csph = 4 * Π * ε * ε0 * r = 4 * 3.14 * 1 * 8.85 * 10-12 * 18 * 10-9 ≈ 2 * 10-18 Cl.

Answer: The electrical capacity of the taken metal sphere is 2 AF.