Electromagnetism Flashcards
Static distribution of charges produces ________
Electric field
Change in motion produces _______
Magnetic field
Example of charges in motion
Electric current
Convinced that unification of the forces in nature. Electricity and magnetism were related.
Hans Christian Oersted
Permanent magnet is equivalent in its magnetic action to a coil of wire carrying a current
Solenoid
Alignment of the molecules with an external magnetic field
Magnetization
Each molecule in permanent magnet has a _______
Closed-current loop (north to south)
He described the forces initiated by electric charges or magnetism as a disturbance in space
Michael Faraday
Forces initiated by electric charges or magnetism as a disturbance in space
Field
Magnitude of the induced current depends on four factors:
Strength of magnetic field
Velocity of magnetic field
Angle of conductor
Number of turns in the conductor
Faraday built the ff:
Generator, motor, transformer
Change mechanical energy to electrical energy
Generator
Converts electrical energy into motion
Motor
Efficiently raise or lower AC voltages
Transformer
“The induced current in the coil produces a magnetic field to oppose in magnetic field which produced it”
Lenz law
According to James Clerk Maxwell
Changing magnetic field can make electric field, vice versa.
Fluxus
Flow
Fluere
To flow
Space around a current flowing through a piece of conductor
Magnetic flux
SI unit of Magnetic flux
weber (Wb)
Arranging wire in a coil and running a current through produces a magnetic field that looks a bar magnet
Electromagnet
Putting a real magnet inside, can shove the magnet back and forth
Solenoid
Produced when an electric current flows through a coil of wire
Magnetic field
Current-carrying coil of wire wrapped around an iron core
Electromagnet
Electromagnet can be made stronger by:
Wrapping the coil around an iron core
Adding more turns
Increasing the current flowing through the coil
One of the four fundamental interactions
Electromagnetism or electromagnetic force
