ответьте на вопросы на английском:
1) what is called conventional or Franklin current?
2) what types of current do you know?
3) in what can current density by expressed?
4) what is frequency?
5) what does an electric current always produce?
6) explain what skin effect is

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1) Physicists consider current to flow from relatively positive points relatively negative points. (есть в тексте)
2) Alternating and direct current.
3) It is expressed in amperes per square meter, amperes per square centimeter or amperes per square millimeter.
4) This is a physical quantity equal to the number of identical events per unit time.
5) Magnetic field.
6) The skin effect is when the current density is high near the outer surface of the conductor and low near the center.