ELECTRICITY
buildup of electrical charge, either positive or negative
what is static electricity ?
physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.
what is magnetism ?
electric circuit with a break that prevents electricity from flowing through it.
what is an open circuit ?
device that transforms or converts chemical energy into electrical energy or electric current.
what is a battery ?
direction of the current induced in a wire is such that the current’s induced magnetic field opposes the change in magnetic field that originally induced the current.
what is Lenz' law ?
scientific instrument used to detect charged objects.
what is an electroscope ?
property of a material that describes its ability to exert a force on a magnet
what is magnetic ?
electric circuit where the switch is connected (or closed), allowing electricity to flow through the circuit.
what is a closed circuit ?
instrument to measure the voltage, or potential difference, across one or more components of a closed circuit.
what is a voltmeter ?
changing magnetic flux through a coil of wire will induce an emf in the wire that is proportional to the number of loops and the rate of change of the magnetic field.
what is Faraday’s law of induction ?
study of electric charges at rest.
what is electrostatics ?
region of a material comprised of many atoms with their individual magnetic fields aligned.
what are magnetic domains ?
electric circuit where the electric current can take more than one path.
what is a parallel circuit ?
a device that stores electric charge.
what is a capacitor ?
sum of the voltage drops (voltage differences) around a closed loop equals zero
what is Kirchhoff’s voltage law ?
flow of electric current through a conductor
what is electricity ?
two regions in a magnetic field, called magnetic north and south poles, that produce the strongest magnetic force.
what are magnetic poles ?
electric circuit where the electric current has only one path.
what is a series circuit ?
device that increases or decreases voltage in AC circuits in order to minimize energy lost during transmission.
what is a transformer ?
sum of all currents entering a junction must equal the sum of all currents exiting that junction.
what is Kirchhoff’s current law ?
flow of electric charges, usually in wires or other conductors.
what is an electric current ?
to develop a magnetic field in an object in response to applying an external magnetic field.
electric circuit where the resistance is very low or near zero.
what is a short circuit ?
instrument used to detect very small electric currents by detecting the magnetic force on a loop of wire.
what is a galvanometer ?
current in an electric circuit is proportional to the voltage applied and inversely proportional to the resistance.
what is Ohm's law ?