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 fields due to each wire at the midpoint will be in opposite directions. Using the formula B = (μ₀I)/(2πr), calculate the fields due to each wire and subtract them to find the net field. The result is 2.0 × 10⁻⁵ T.

Two Long Parallel Wires 40 Cm Apart Are Carrying Currents