CP Workbook
Induction
Hans Christian Oersted discovered that
magnetism and electricity are related
independent of each other
Magnetism is produced by
batteries
the motion of electric charges
Faraday and Henry discovered that electric current can be produced by
batteries
the motion of magnet
More specifically, voltage is induced in a loop of wire if there is a change in the
batteries
magnetic field in the loop
This phenomenon is called
electromagnetism
electromagnetic induction
When a magnet is plunged in and out of a coil of wire, voltage is induced in the coil. If the rate of the in-and-out motion of the magnet is doubled, the induced voltage
doubles
remains the same
halves
If instead the number of loops in the coil is doubled, the Induced voltage
doubles
remains the same
halves
A rapidly changing magnetic field in any region of space induces a rapidly changing electric field
magnetic field
gravitational field
which in turn induces a rapidly changing magnetic field
electric field
baseball field
This generation and regeneration of electric and magnetic fields makes up
electromagnetic waves
sound waves
both of these
Paul G. Hewitt
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