A current of 5 A flows through a 70 cm long aluminum conductor with a cross-sectional area

A current of 5 A flows through a 70 cm long aluminum conductor with a cross-sectional area of 0.75 mm2. What is the voltage at the ends of this conductor?

Initial data: l (length of the aluminum conductor) = 70 cm = 0.7 m; S (cross-sectional area of the aluminum conductor) = 0.75 mm ^ 2, I (current flowing in the conductor) = 5 A.

Reference data: ρ (resistivity of aluminum) = 0.028 Ohm * mm ^ 2 / m.

1) Determine the resistance of the conductor: R = ρ * l / S = 0.028 * 0.7 / 0.75 ≈ 0.026 Ohm.

2) Let’s calculate the voltage at the ends of the aluminum conductor: U = I * R = 5 * 0.026 = 0.13 V.

Answer: The voltage at the ends of the conductor is 0.13 V.