What is the resistance of 100 m of 0.5 mm² iron wire?
| April 9, 2021 | education
Given:
l = 100 meters – the length of the iron wire;
s = 0.5 mm2 (square millimeters) is the cross-sectional area of the iron wire;
r = 0.098 Ohm * mm2 / m – iron resistivity.
It is required to determine R (Ohm) – the total resistance of the iron wire.
To determine the resistance of an iron wire, you must use the following formula:
R = r * l / s = 0.098 * 100 / 0.5 = 9.8 / 0.5 = 98/5 = 19.6 Ohm.
Answer: The total resistance of the iron wire is 19.6 ohms.
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