. A coil of 5000 turns is wound in the form of an air-cored torus with a square cross section. The inner diameter of the torus is 60mm and the outer diaameter is 100mm. The coil current is 0.25A. (a) Determine the maximum and minimum values of the magnetic field intensity within the toroidal coil. (b) Determine the magnetic flux within the torus. (c) Determine the average flux density across the torus and compare it with the flux density midway between the inner and outer edges of the coil.

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -

You can find results and justify them? you can test your hypothesis

That big glowy thing in the sky is called the sun