1. The problem statement, all variables and given/known data A 1.0 m piece of wire is coiled into 200 loops and attached to a voltage source as shown. A. Find the strength of the magnetic field inside the coil if V = 100 V and R = 40 Ω. B. Which direction does the magnetic field point? C. The wire is then uncoiled and re-wrapped so that the cross-sectional area of the coil is twice what it was previously, though the length stays the same. What is the new magnetic field strength inside the coil? D. The entire coil of wire is now placed into an external magnetic field as shown below. Which direction will the coil first begin to rotate? 2. Relevant equations B=(u0*N*I)/L u0=4pi*10^-7 TM/A 3. The attempt at a solution I solved the first two parts of the problem. B=(4pi*10^-7 TM/A*200*2.5A)/(0.1m)= 6.28e-3 T and the magnetic field points down with the right hand rule. Now part C has some weird wording to the problem that is throwing me off. Also would not understand part D really. Don't remember ever going over it before.