Hey I'm wondering if someone can help me out with this question. Q: In order to measure the magnetic fields produced by the power lines carrying 50Hz alternating current, a coil consisting of 1500 turns of area 5cm^2 as constructed. Suppose that there is a single power line carrying a current which has an amplitude of 800A and that the coil is 10m from the wire. a) What is the magnitude of the magnetic field at the coil I found this using B =[N(mu_0)I]/2R b) What is the magnitude of the induced emf in the coil? I'm stumped on B could anyone point me in the right direction? I was using the idea that change in flux over time can be used to find induced emf and that in an alternating curret dI/dt=2*pi*f*I - but the problem is that i don't know where to go from there. Thanks in advance!