Question

Calculate the magnetic field and its direction at point P, which is 2.0 cm away from the top wire and 4.0 cm from the bottom wire. Assume both wires are infinitely long and each carries a current of 1.5 A.

Answer 1

Explanation : B = μ₀i / 2πr

B1 = (2×10^-7) × 1.5/0.02

= 15 μT

B2 = (2×10^-7 ) × 1.5/0.04

= 7.5 μT

total field = 15 μT + 7.5 μT

= 22.5 μT