A long straight wire carries 400 A. How far from the wire will the magnetic field generated equal that of earth (i. e. 3X 10-4 T)?

The modern-day generator works on the principle of electromagnetic induction discovered by michael faraday in 1831-32. faraday discovered that the above flow of electric charges could be induced by moving an electrical conductor, such as a wire that contains electric charges, in a magnetic field.

An atom's smaller negative particles are at a distance from the central positive particles, so the negative particles are easier to move. 

Answer the radiant sun;