magnetism 4
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Magnetism 4Electricity and Magnetism Related
Hans Christian OerstedDiscovered that an electric current causes a
magnetic field
How? Connected a series circuit
and turned on the power. A nearby compass moved!
This Proved there was an
electromagnetism link
Michael FaradayDiscovered that a magnetic field causes an electrical current.
How? Moved a wire through the magnetic field of a strong magnet. Found that an
electric current was produced in the wire.
ElectromagnetTemporary magnet made by wrapping a current
carrying wire around an iron core.
More coils = ____________
More current = ____________
More power
More power
GalvanometerMoving coil electric current detector.
The amount of deflection of a needle attached to the coil is proportional to the current passing through the coil.
GalvanometerThe accuracy of moving coil meters is dependent upon.….
Having a uniform and constant magnetic field
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