inducing a current in a coiled conductor
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Inducing current in a coiled conductor
Aim: to study the effect on a generated electric current when;
a) the distance between the coil and the magnet are varied
b) the strength of the magnet is varied
c) relative motion between the coil and the magnet is varied
Apparatus:
Galvanometer
Two coils having different numbers of turns of wire
Two bar magnets, of different strengths
An iron core that fits into the coils
Connecting wires
Prediction:
When a magnet is passed through a coil of wire, a current is induced in the coil. The strength and the speed of the magnet will determine the size of the current as it passes through the coil. The strength or magnitude of the induced current is governed by Faraday's Second Law: the magnitude of an induced E.M.F. is proportional to the rate of change of magnetic flux linkage. This means that the stronger the magnet and the greater the speed of the magnet as it travels through the coil, the larger the current produced from the coil. As a current passes through a coil, a magnetic field should be generated. Conversely, as a magnet travels through a coil, it generates a current. Lenz's law says that the current produced by the magnet flows in the opposite direction, producing a magnetic field that opposes the magnetic field of the magnet...