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If we doubled the voltage of the circuit to 20 volts, we would also double the amount of current to 2 amps. Ohm also discovered that the amount of current flowing through a circuit decreased when he increased the amount of resistance in the circuit. If we made the wire in our 10-volt circuit twice as long, that would create twice as much resistance. As a result, only half an ampere of current would flow through the circuit. In 1827 Ohm published his findings. These discoveries are now known as Ohm’s law.

It is the speed of light. Could it be that light is a form of electromagnetic energy? Yes. Maxwell discovered that light is an electromagnetic wave. More recent discoveries have shown that light radiation is actually generated by the rapid vibration of electrons in atoms. 33 Laws of Electromagnetism Maxwell also predicted that researchers would find other kinds of electromagnetic radiation besides visible light. Maxwell’s equations said there should be waves with lower amounts of energy than visible light, and waves with higher amounts of energy.

A moving magnetic field generates an electrical field. 32 Since 1864 experiments have shown Maxwell’s laws to be correct again and again. Because magnetism and electricity are just different aspects of the same force, scientists usually refer to that force as electromagnetic force. Along with gravitation and the nuclear forces in atoms, it is one of the basic forces of the universe. As Maxwell considered his discovery, he realized something else that was very interesting. A change in an electric field creates a change in a magnetic field.

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