Two long parallel wires 40 cm apart are carrying currents of 10 A and 30 A in the same direction. What is the magnitude of the magnetic field halfway between the wires? A) 4.0 * 10^-5 T B) 1.0 * 10^-5 T C) 3.0 * 10^-5 T D) 2.0 *10^-5 T

Question

Quizplus · Accepted Answer

The magnetic field due to each wire at the midpoint can be calculated using the formula B = (μ₀I)/(2πr). The fields due to the two wires will be in opposite directions, so the net field is the difference between them. Calculating this gives a net magnetic field of 2.0 × 10^-5 T.

Two Long Parallel Wires 40 Cm Apart Are Carrying Currents