Measurements of electricity
what is one ampere equal to?
1000 milliamperes
what does an inverter do?
changes dc to ac
what is static electricity?
stationary electric charge, typically produced by friction
what is a pulse?
length of time current is flowing
what two conditions must exist for electric current to be produced
source and circuit
what voltage may large motors require?
240 volts
what does a rectifier do?
changes ac to dc
what is a circuit breaker?
contains two pieces of metal that contact eachother
what is frequency?
number of electrical pulses delivered to the body in one second
what is the difference between conductors and insulators?
conductors are materials that best transport electricity and insulators are materials that don't allow current to pass through them
what is skin care equipment measured in?
milliamperes
what does a rheostat do?
adjusts the flow of current that can change volume or intensity of voltage
it is wider to make it so you cant insert it the wrong way
what do you not do when theres a fire from an overload of an electric circuit?
Do not put water on it
what is a direct current?
electrons move at an even rate in one direction
what is the name of the german physicist who discovered ohms
georg ohm
what does a transformer do?
transfers electricity by an oscillating magnetic field that connects two or more electrical currents
what do you avoid when using electrical equipment?
water and metal surfaces
what does P.A.S.S. stand for?
p- pull the pin
a- aim the hose at base of fire from at least 6 feet away
s- squeeze the handle to begin flow of chemical
s- spray the chemical discharge back and forth over fire
what is an alternating current?
electrons flowing first in one direction then in the other.
what is the amount of resistance in a conductor determined by?
size, material, temperature
what does a capacitor do and what does it not produce?
stores an electrical charge and does not produce new electrons
what happens if an overload occurs with a fuse?
the fuse heats up and wires melt, breaking the circuit and cutting the flow of electricity
What does GFCI stand for?
Ground Fault Circuit Interrupter
what are the five different waveforms?
rectangular, square, sinusoidal, saw-toothed, triangular