TABSTER
Active VIP Member
a little electrical lesson for yah'all.
Votage is the force or the EMF (electron moving force)...... measured in volts and requires potential differance to measure (two seperate points). voltage is "across" switch open will read 12 volts, switch closed will read zero volts..... good fuse will read zero volts (each end is same point, no potential differance) bad fuse reads 12 volts.... potential differance. and is measure absolute or relative
current is measured "through" measured in amps and is what causes fuses to blow, to much current creates heat. Think of electrons as people, trying to get out of a collisium in a emergency, all bumping and grinding into each other trying to get out the exits.... heat, friction. finally to many electrons/people trying to get through a path and something fails.....and, so "pop" goes the fuse
.
resistance is measured in ohms. it is opposition or restricts current flow. resistors, lights, motors....all have resistance.... also to measure resistance there has to be isolation and no voltage.
<*Fuses, create opposition for current, when current gets to high, the fuse blows to "open" the circuit, this action protects the path and load in the circuit. most common reason for a fuse to blow is a interuption in the path or load in a circuit. short circuit causes big current and no voltage...Pop goes the protective device.... in this case the fuse. without a fuse.....then pop goes the path or the load....ie the fan motor, light bulb.... whatever it may be.*>
4 things required in a circuit.....
source..... battery or some type of supply
control device....switch or relay.
path............wires/path
load.............. light, motor, electronics...
"Electricity is like human beings, always takes the path of least resistance"
Open circuit = Big voltage- zero current- 0 amps
Short circuit = Big Current- No voltage- infinite amps
Closed circuit = Current flow "through" and voltage "across"
Votage is the force or the EMF (electron moving force)...... measured in volts and requires potential differance to measure (two seperate points). voltage is "across" switch open will read 12 volts, switch closed will read zero volts..... good fuse will read zero volts (each end is same point, no potential differance) bad fuse reads 12 volts.... potential differance. and is measure absolute or relative
current is measured "through" measured in amps and is what causes fuses to blow, to much current creates heat. Think of electrons as people, trying to get out of a collisium in a emergency, all bumping and grinding into each other trying to get out the exits.... heat, friction. finally to many electrons/people trying to get through a path and something fails.....and, so "pop" goes the fuse
.
resistance is measured in ohms. it is opposition or restricts current flow. resistors, lights, motors....all have resistance.... also to measure resistance there has to be isolation and no voltage.
<*Fuses, create opposition for current, when current gets to high, the fuse blows to "open" the circuit, this action protects the path and load in the circuit. most common reason for a fuse to blow is a interuption in the path or load in a circuit. short circuit causes big current and no voltage...Pop goes the protective device.... in this case the fuse. without a fuse.....then pop goes the path or the load....ie the fan motor, light bulb.... whatever it may be.*>
4 things required in a circuit.....
source..... battery or some type of supply
control device....switch or relay.
path............wires/path
load.............. light, motor, electronics...
"Electricity is like human beings, always takes the path of least resistance"
Open circuit = Big voltage- zero current- 0 amps
Short circuit = Big Current- No voltage- infinite amps
Closed circuit = Current flow "through" and voltage "across"
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