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matter has _______ and _______ equivalence. Matter may also have _______.
mass and energy; electric charge
5 laws of electrostatics
repulsion/attraction law, concentration law, distribution law, inverse square law, movement
associated w/ electric charge; points outward from pos charge and toward a neg charge. uncharged particles do not have an electric field
electrostatic force b/t 2 charges is directly proportional to the product of their charges and inversely proportional to the square of the distance b/t them
electric charge of a ______is concentrated along the ______of the surface
conductor; sharpest curvature
___________charge = object with weaker negative charge or an object with fewer electrons than another object
3 places where electric current takes place
vaccum (xray tube), neon gas, ionic solutions and metals
measure in amperes (A)
electric potential applied to objects such as a copper wire, then electrons move along the wire
allow electrons to flow freely with no resistance below certain temp. works well with very cold liquid ex. noibium and titanium wire used in MRI
voltage across the total cicuit or any portion of the circuit is equal to the current times the resistance V= IR
contains elements that are connected at their ends rather than lying in a line during a conductor
alternating current ( commentating ring)
electron that flow alternately in opposite directions 60Hz/cycle 1 cycle=1/60s single 120 double 240
3 principle types of magnets
artificial/permanent- iron, nickel, cobalt
temporary electromagnet- coiled wire with iron core as induce on wire you get a magnetic field, ceiling fan
4 magnetic states of matter
ferromagnetic-iron, nickel, cobalt
ability to transfer energy from one object to another with out touching. ferromagnetic objects
Farraday's Law's (4) 1st law of electrodynamics
1. strength of the magnetic field
2. velocity of the magnetic field as it moves past the conductor
3. angle of the conductor to the magnetic field
4. # of turns in the conductor (more turns greater intensity)
what is the difference b/t generator and motor
generator - converts mech to electrical
motor-converts electrical to mech
transform electric potential and current into high and low intensity. operates on AC, changes amplitude of voltage
step up transformer
output is lower than input
secondary current is higher than primary
greater than 1
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