The relationship between energy and charge is potential difference or voltage. Where a volt is defined as existing between two points in an electric field when one joule of energy is required to move a charge of one coulomb between the two points.
The relationship between a cathode and an anode involves
the time it duration for the action and voltage drop
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Hans Christian Oersted
Hans Christian Oersted established the relationship between electricity and magnetism in 1820.
This relationship was discovered by Karl Georg Ohm.
He used an electric current to affect the needle of a compass.
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A French scientist named Andre-Marie Ampere studied the relationship between electricity and magnetism.
A notable series of investigations of the relationship between electricity and magnetism was conducted almost in parallel in England by Michael Faraday and in America by Joseph Henry. Both Faraday and Henry discovered the principle of the dynamo in 1830-31, for example. Although they independently discovered many of the same connections and devices, Faraday's work was to have the greater theoretical impact while Henry's had more immediate practical application.
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Electricity and magnetism are closely related. in 1802, Hans Christian Ørsted observed this by noting that electric current caused magnetism. In 1821, Michael Faraday, noted that electric currents could be induced by magnetic fields. In the 1860's, James Clerk Maxwell, enhanced this with his Electromagnetic Theory, and Maxwell's Equations, which unified the relationship between electricity, magnetism, and light into a common Electromagnetic Field. Several other physicists contributed to this knowledge.
Oersted and Faraday discovered the connection between magnetism and electricity, that any time electrical current is flowing there is a magnetic field.
because they are both aspects of the electromagnetic force.
Electric motor