Magnetic fields due to currents

Question

Step-by-step solution

1. Step 1

   $B = \mu_0 I/(2\pi r)$.

   $B = \dfrac{4\pi \times 10^{-7} \times 5.0}{2\pi \times 0.10} = 1.0 \times 10^{-5} \text{ T}$

Question

Step-by-step solution

1. Step 1

   $B = \mu_0 n I$ where $n = N/L$ = 2000/m.

   $B = 4\pi \times 10^{-7} \times 2000 \times 2.0 \approx 5.0 \times 10^{-3} \text{ T}$