Electricity and Magnetism Flashcards
What is the magnetosphere?
Area surrounding Earth affected by Earth’s magnetic field
Resistance
A material’s opposition to the flow of electric current
Direct current
Electric current that flows in only one direction
Fuse
A safety device with a thin metal strip that will melt if too much current passes through a circuit
What is a ferromagnet?
Material that can be magnetized because it contains iron & magnetic domains
Resistor
An electrical device that resists the flow of an electrical current
Parallel circuit
A circuit that contains more than one path for current flow
Voltage
The difference in electrical potential energy between two places in a circuit
What is an electron?
Negatively charged particles that orbit around the nucleus of an atom
What is a solenoid?
A coil of current carrying wire
Insulator
Prevent the movement of electrical charge
Alternating current
A flow of electric charge that regularly reverses its direction
Ohm’s law
Law that relates current, voltage, & resistance
Electric current
Continuous flow of charges through a material
What is an electron moment?
Spin of the electron which causes a polar direction
Battery
A device that converts chemical energy to electrical energy
Magnetic materials
Iron,cobalt, nickel, steel
What is a magnet force?
The force a magnet exerts on another magnet or on moving changes
Watts
Unit for power used by an electrical device
Series circuit
A circuit in which all parts are connected end to end to provide a single path of current
Inventor of the light bulb
Thomas Edison
Capacitor
An electrical device used to share electrical charge
Magnetic field
The area of magnetic force around a magnet
What is a magnetic domain?
A region in which many atoms have their magnetic fields aligned
Conductor
Allows the movement of electrical charge
