which is exactly the emf that would be produced if the coils were replaced by a single coil with inductance Leq= L1+ L2+ 2M. (b) We imagine reversing the leads of coil 2 so the current enters at the back of coil rather than the front (as pictured in the diagram). Then the field produced by coil 2 at the site of coil 1 is opposite to the field produced by coil 1 itself. The fluxes have opposite signs. An increasing current in coil 1 tends to increase the flux in that coil, but an increasing current in coil 2 tends to decrease it. The emf across coil 1 is ε11=−−LMdidtbg. Similarly, the emf across coil 2 is 22−didtThe total emf across both coils is +−LLMdidt122This the same as the emf that would be produced by a single coil with inductance
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.