ECE106 Chapter 31: Faraday‘s Law
10 Aug 2015
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Consider the results when a loop of wire is connected to a sensitive ammeter: when the magnet is moved toward the loop, the reading of on the ammeter changes from zero to nonzero, when the magnet is brought to rest and held stationary relative to the loop, value becomes zero, when the magnet is moved away from the loop, the reading becomes opposite than that of being moved towards. An emf is induced in a loop when the magnetic flux through the loop changes with time: the emf is directly proportional to the time rate of change of the magnetic flux through n loops e = - N f d dt e = - q cos ) d ba dt or: emf can also be induced by the change in b, change in area of the loop, change in the angle between b and the normal to the loop, or any combinations of the above.
