An infinitely long wire carrying a current of 2 A is bent at a right angle as shown in the Figure. What is the magnetic field a point P, 10 cm from the corner?

Answer 1

b=a•cos45 =0.1 •0.707 = 0.0707 m
B=2 (μ₀/4π)(I/b)∫cosφdφ {limits: (- π/4) (+π/2)}
=2(μ₀/4π)(I/b)(1+0.707)=
=2.1414 •(μ₀/4π) •2/0.0707=6.06•10⁻⁶T