there is a point charge at the center of the cavity. the silver sphere has a charge of 9.00 nc on its outer surface and a charge of -2.00 nc on the surface of the cavity. what is the value of the point charge?

The value of the point charge is 2 × 10 ⁻⁹ C.Gauss's Law is one of the four equations of strength and magnetism. The 4 packages of Gauss's law are to discover the sector due to a uniformly charged instantly twine, a uniformly charged endless plate sheet, a uniformly charged thin round shell, and a low uniformly charged sphere. Mathematically it's far defined as. ϕ=qε0.The electric field is zero inside the conductor. Using the definition of electric flux and Gauss’s law to find the required point charge at the center of the cavity.q' = -2C at surface cavityA gaussian sphere, which encloses, q (at center) and q'Now, since this surface lies within the conductor, E = 0 at each point on this surface.So, flux Ф = ∫E.Ds =0 and from gauss's law⇒ Ф = q enclosed/ε₀⇒ 0 = q +q'/ε₀⇒ q + q' = 0⇒ q = -q' = - (-2C)                 = 2 NC     or           2 × 10 ⁻⁹ C   Learn more about gauss's law here:-https://brainly.com/question/15519450#SPJ4