The same stresses are applied to the ends of the steel and iron conductors having the same cross-sectional area and mass.

The same stresses are applied to the ends of the steel and iron conductors having the same cross-sectional area and mass. In which conductor is the current stronger?

The strength of the current in an iron conductor is greater than in a steel one, because current strength is inversely proportional to the resistance of the conductor at constant voltage, and steel has a higher resistivity than iron, therefore, the steel conductor has more resistance.

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