Chapter 5 Vocab-Floyd
Terms
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- quantity, measured in ohms, that represents how hard it is to push electrons through a material. High resistance wires are used when electron energy is to be converted into heat energy
- electrical resistance
- an excess of deficit of electrons on an object
- electrical charge
- source of energy producing an alternating current i an electric circuit through the use of electromagnetic induction
- electric generator
- collection of lined that map out the direction that compass needles would point in the vicinity of a magnet
- magnetic field
- a unit of measurement for the amount of current (number of charges) flowing in a wire or elsewhere per unit of time
- ampere (amp)
- two opposite ends of a magnet named north an south that repel like a magnetic pole and attract an unlike magnetic pole
- poles
- a type of electric current, commonly used in household appliances and cars, in which charges alternate their direction of motion
- alternating current
- a dficiency of electrons on an object
- positive charge
- device that operates by supplying current to an electromagnet to make the magnet move and generate mechanical power. The motor employs permanent magnets and rotating loops pf wire inside the poles of this magnet
- electric motor
- an excess of electrons on an object
- negative charge
- term used to refer to the unified nature of electricity and magnetism
- electromagnetic force
- the force that would be exerted on a postive charged object. every charged surrounded by an electric field
- electric field
- the pressure by the energy source in a circuit, measured in volts
- voltage
- materials that exert a magnetic field on other objects
- magnet
- unbroken path of material that carries electricity and consists of three parts: a source of energy, a closed path, and a device to use the energy
- electric circuit
- an empirically derived rule that states that the magnitude of electrostatic force between any two objects, and inversely proportional to the square of the distance between them
- Coulomb's law
- a device that converts stored chemicals energy into kinetic enrgy of charged particles running through an outside wire
- electric current
- a flow od charged particles measured in ampheres
- electric current
- device that produces a magnetic field from a moving electrical charge
- electromagnet
- the force exerted by magnets on each other
- magnetic fields
- type of electric current in which the electrons flow in one direction only, for example, in the chemical reaction of a battery
- direct current
- a force, more powerful than gravity, that moves objects both toward and away from each other depending upon the charge
- electricity
- a phenomenon caused by the transfer of electrical charge between objects. often observed as lightning or as sparks produced when walking across a wool rug on a dry, cold day
- static electricity