Two long, straight wires carry equal currents in opposite directions as shown in figure. The separation between the wires is 5.0 cm. The magnitude of the magnetic field at a point P midway between the wires i $s ____$ μT (Given : μ₀ = 4π × 10⁻⁷ TmA⁻¹)

Question

G1 Physics · Accepted Answer

At point P, distance from each wire is r = 2.5 cm = 2.5 × 10⁻² m Magnetic field due to one long straight wire: B = μ₀I/(2πr) The currents are opposite, so at the midpoint the two magnetic fields are in the same direction. Therefore, Btotal = 2 × μ₀I/(2πr) = 2 × [4π × 10⁻⁷ × 10] / [2π × 2.5 × 10⁻²] = 1.6 × 10⁻⁴ T = 160 μT Answer: 160.

Two long, straight wires carry equal currents in opposite directions as shown in figure. The separation between the wires is 5.0 cm. The magnitude of the magnetic field at a point P midway between the wires i s ____ μT (Given : μ₀ = 4π × 10⁻⁷ TmA⁻¹)