PHYS 308 Homework
 RU Links   Radford University   Department of Physics   RU Planetarium   RUSMART pages (weather) Spring 2015 Classes & Info   PHYS 308   PHYS 309   PHYS/GEOL 406   My daily schedule   My C.V. Summer jobs/internships   NSF REU Program (list of REU sites) Other links   The Nucleus (resources for    physics/astronomy undergrads)   Pre-Health information   R.U.F.R.E.E.Z.I.N.G.    pics from the north pole trip    the picture from the trip   Simple 2-liter water rocket   American Institute of Physics Homework #11: Due Friday, April 17, by 5:00pm. A wire has a current of 2.40A running through it in the z-direction. A square loop with sides 15cm long is located 10cm away from the wire (i.e. the near side of the loop is 10cm away, and the far side is 25cm away). The loop lies in the x-z plane. Calculate the net magnetic flux through the loop. Hint: Note that the magnetic field through the loop is not uniform. For the problem above, calculate the εmf induced when the current in the wire is turned off in a time of 0.25sec. The nearby Claytor Lake hydroelectric power plant has large coils of wire spinning in magnetic fields created by siphoning off some of the electricity generated by the coils themselves. Asume those magnetic fields have a magnitude of 0.025T. The coils of wire have a radius of 1.60m. They produce electricity at a maximum of 220kV. Find the number of current-carrying loops in each set of coils. Recall that you will have to make a reasonable assumption. problem 7.21 problem 7.23 problem 7.29. You must show all of the steps in your derivation here starting from Faraday's Law in order to get any credit for this problem.    That's all for homework #11.