Part of eval backend edge, agent version bdd945f
Two long and parallel straight wires A and B carrying currents of 8.0 A and 5.0 A in the same direction are separated by a distance of 4.0 cm. Estimate the force on a 10 cm section of wire A, in newtons?
expects 2 × 10⁻⁵ N
draft 24: failed in solution.rb, line 7 — ArgumentError: two_parallel_wires gives nothing called length
1solve :two_parallel_wires, using: [MagneticFieldOfCurrents, MagneticForce] do2 objects :a, :b34 take current_a: a.current5 take current_b: b.current6 take separation: a.distance_from_the_wire(by: b)7 take length: a.length_in_the_fieldArgumentError: two_parallel_wires gives nothing called length89 deduce_from "a 10 cm section of wire A", a.length_in_the_field => "10 cm"1011 field = b.field_near_a_wire12 force = a.force_on_a_wire1314 answer force:, in: "N", figures: 21516 conclusion "Each wire creates a magnetic field at the other; the force per unit length is mu_0 I_1 I_2 / (2 pi d), and the total force is that times the length."17end