PCS 125 Chapter Notes - Chapter 6: Electromagnetic Induction, Electrical Network, Electrical Resistance And Conductance
3 Aug 2018
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Whenever the magnetic flux linked with an electric circuit changes, an emf is induced in the circuit. E d / dt e = d / dt where constant of proportionality is one and negative sign indicates lenz"s law. Here, flux = nba cos , si unit of = weber, Cgs unit of = maxwell, 1 weber = 108 maxwell, The direction of induced emf or induced current is always in such a way that it opposes the cause due to which it is produced. Lenz"s law is in accordance with the conservation of energy. Note to apply lenz"s law, you can remember rin or in (when the loop lies on the plane of paper) (i) rin in rin, r stands for right, i stands for increasing and n for north pole (anticlockwise). If a rod of length 1 moves perpendicular to a magnetic field b, with a velocity v, then induced emf produced in it given by.
