One-dimensional generalized heat conduction equation representing temperature distribution in a sphere, based on thermal conductivity k, specific heat capacity \(C_p\), density \(\rho\), and energy generation E, can be written as \(\dfrac{1}{r^n}\dfrac{\partial}{\partial r}\left(r^n k\dfrac{\partial T}{\partial r}\right) + E = \rho C_p\dfrac{\partial T}{\partial t}\), where the value of n is