It is the proton.It has a possitive charge.
A Sphere
The distribution of the electric field inside a sphere is uniform, meaning it is the same at all points inside the sphere.
If the sphere is conducting, all the charge is distributed uniformly on the outer surface of the sphere.
The electric potential inside a nonconducting sphere is constant and the same at all points within the sphere.
The electric field inside a charged sphere is uniform and directed radially towards the center of the sphere.
The electric potential inside a uniformly charged sphere is constant and the same at all points within the sphere.
As with all cells, the nucleus of an onion cell is spherical. Since nuclei essentially exist suspended in a cells cytoplasm the membrane will assume the most efficient and lowest energy shape, a sphere.
The electric field inside a uniformly charged sphere is zero.
Zero, because the electric field inside a charged hollow sphere is zero. This is due to the Gauss's law and symmetry of the charged hollow sphere, which results in no net electric field inside the sphere.
The gravitational force inside a solid sphere is zero because the gravitational forces from the parts of the sphere above cancel out the forces from the parts below, resulting in a net force of zero at any point inside the sphere. This is known as the shell theorem.
The electric field inside a sphere of uniform charge density is zero.
celestial sphere A+