Find the resistance of a 2 m long conductor with a cross section of 1 mm² made of aluminum.

Given:

l = 2 meters – conductor length;

s = 1 square millimeter is the cross-sectional area of the conductor;

r = 0.028 Ohm * mm2 / m is the resistivity of aluminum (the material from which the conductor is made).

It is required to determine R (Ohm) – the total resistance of the conductor.

To determine the total resistance of a conductor, you must use the following formula:

r = R * s / l, hence:

R = r * l / s = 0.028 * 2/1 = 0.056 / 1 = 0.056 Ohm (56 mOhm).

Answer: The total resistance of the conductor is 0.056 Ohm (56 mOhm).