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Thales was incorrect in believing the attraction was due to a magnetic effect, but later science would prove a link between magnetism and electricity.

Electricity would remain little more than an intellectual curiosity for millennia until 1600, when the English scientist William Gilbert made a careful study of electricity and magnetism, distinguishing the lodestone effect from static electricity produced by rubbing amber.

The most familiar carriers of electrical charge are the electron and proton.

Engineers work under the assumption that charge is a conserved quantity, that is, the net charge within an isolated system will always remain constant regardless of any changes taking place within that system.

This discovery led to the well-known axiom: like-charged objects repel and opposite-charged objects attract.Study has shown that the origin of charge is from certain types of subatomic particles which have the property of electric charge.Electric charge gives rise to and interacts with the electromagnetic force, one of the four fundamental forces of nature.The photoelectric effect is also employed in photocells such as can be found in solar panels and this is frequently used to make electricity commercially.SECTION TWO: ELECTRIC CHARGE The presence of charge gives rise to an electrostatic force: charges exert a force on each other, an effect that was known, though not understood, in antiquity.

The electromagnetic force is very strong, second only in strength to the strong interaction, but unlike that force it operates over all distances.

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