A current of 2 A flows along a long straight conductor. Determine the magnetic induction

A current of 2 A flows along a long straight conductor. Determine the magnetic induction at a distance of 0.4 cm from the axis of the conductor.

Initial data: I (current that flows through the conductor) = 2 A; r (distance from the selected point to the axis of the conductor) = 0.4 cm = 0.4 * 10-2 m.

Reference values: μ0 (magnetic constant) = 4 * Π * 10-7 H / m; μ (magnetic permeability of air) ≈ 1.

The magnetic induction can be calculated by the formula: B = μ * μ0 * I / (2 * Π * r).

Let’s calculate: B = 1 * 4 * Π * 10-7 * 2 / (2 * Π * 0.4 * 10-2) = 1 * 10-4 T = 0.1 mT.

Answer: The magnetic induction at a distance of 0.4 cm from the axis of the conductor is 0.1 mT.