Electromagnetic induction

• Lenz's law states that the polarity of an induced emf opposes any change causing it.
• The direction of the induced current is determined by Fleming's left-hand rule.
• The direction of current flow can be determined using Fleming's left-hand rule, where the thumb represents the magnetic field lines, the first two fingers represent the motion of the conductor, and the third finger represents the direction of the induced current.
• Induced EMF = -N dφ/dt
• Faraday's Law is used to calculate the magnitude of the induced EMF when there are changes in flux linkage or number of turns.
• Induced e.m.f. = -N dφ/dt
• Faraday's Law states that the magnitude of the induced e.m.f. depends on the rate at which the magnetic flux linkage changes with time, as well as the number of turns in the coil.
• The equation for Faraday's Law is V = -N(dφ/dt), where N is the number of turns on the coil.