The burned-out copper coil was replaced with a steel coil with the same cross-sectional area and length. Indicate how the current strength in the steel spiral has changed in comparison with the copper one, if the voltage at its ends remains the same.
The strength of the current in the steel spiral is less than in the copper one, because the current strength is inversely proportional to the resistance of the conductor at constant voltage, and steel has a higher resistivity than copper, therefore, the steel coil has more resistance.
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