What was the revolution in atomic theory produced by the discovery of the electron?
the atom was divisible.
the atom was comprised of particles.
the atom was one unit.
each atom was unique.

The answer to this problem is the second item in the choices which is "The atom was comprised of particles". This atomic theory also proves that atoms cannot be destroyed nor created and it composed of many particles. It is also said that atoms of the same elements can be identical.

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.