Electric current and electromotive force - EMF - are two concepts that should be well understood, both in the study of electronics and radio electronics. The phenomenon of electric current can be observed in various media, but the general order is the movement of charges. Such a motion of charges is built up by the action of an electric field on them. In a metallic conductor, the only charge carriers are electrons. They move more intensively, the stronger the electric field, which depends on the parameters of the power source or generator, the main characteristic of which is the electromotive force - EMF. The higher the EMF, the stronger the electric current.
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Electric current and EMF | Complete parsing! Electronics for Beginners # 2
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