Objective/ProcedureIt was previously known that a moving current causes a magnetic field. The phenomenon ofelectromagnetic induction was discovered when there was an attempt to generate current by theuse of a steady magnetic field. In the end, it was discovered that a time changing magnetic fieldwill induce the flow of current but not a steady magnetic field. The goal of this experiment was toatte
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Objective/Procedure
It was previously known that a moving current causes a magnetic field. The phenomenon of
electromagnetic induction was discovered when there was an attempt to generate current by the
use of a steady magnetic field. In the end, it was discovered that a time changing magnetic field
will induce the flow of current but not a steady magnetic field. The goal of this experiment was to
attempt to induce a current in wire by a variety of ways: moving a permanent magnet near a
wire, moving a current carrying coil (with it’s own magnetic field) near a wire and also changing
the current in the second coil while it remains stationary. All of the above described methods
would produce a change in flux that in theory should induce a current to flow.
Theory
Current induction is based on a change in magnetic flux. Magnetic flux is the measurement of
the total magnetic field which passes through a given area, given by the integral of the magnetic
field that is passing through a differential area. Only the component of the magnetic field that is
perpendicular to the area contributes to the flux. According to Faraday’s Law, the EMF (induced
voltage) is negative the change in the magnetic flux with respect to time. The induced voltage is
created by a non-conservative electric field and this will give rise to a current. The magnitude of
the voltage across a coil will also depend on the number of turns in the coil.
Data and Calculations
See attached Graphs
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