electric
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electric
alright i'm taking electric course and let me get this straight..
to complete a circuit u need pos and neg right..
now theres something called available voltage and source voltage.. source voltage is easy to check because u use the power source which is battery.. now avaiable voltage u have to use a ground and one of the power source of the circuit... how is available votage and source voltage different..
okay.. voltage drop.. is pressure used.. so only time voltage drop is when its under load like a light...
so if voltage drop is because of load and resistance causes the load.. so basicially.. voltage drop, resistance stay the same.. but load increase right?
kinda confused..
to complete a circuit u need pos and neg right..
now theres something called available voltage and source voltage.. source voltage is easy to check because u use the power source which is battery.. now avaiable voltage u have to use a ground and one of the power source of the circuit... how is available votage and source voltage different..
okay.. voltage drop.. is pressure used.. so only time voltage drop is when its under load like a light...
so if voltage drop is because of load and resistance causes the load.. so basicially.. voltage drop, resistance stay the same.. but load increase right?
kinda confused..
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Joined: Nov 2002
Posts: 613
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From: Chandler, AZ, USA
Re: electric (soon2bdropped)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by soon2bdropped »</TD></TR><TR><TD CLASS="quote">alright i'm taking electric course and let me get this straight..
to complete a circuit u need pos and neg right..
now theres something called available voltage and source voltage.. source voltage is easy to check because u use the power source which is battery.. now avaiable voltage u have to use a ground and one of the power source of the circuit... how is available votage and source voltage different..
okay.. voltage drop.. is pressure used.. so only time voltage drop is when its under load like a light...
so if voltage drop is because of load and resistance causes the load.. so basicially.. voltage drop, resistance stay the same.. but load increase right?
kinda confused..</TD></TR></TABLE>
If your course used terminology like this, I can see why you're confused.
There's no such things as "available voltage" or "source voltage", at least these aren't any commonly used terms. There's just "voltage". Voltage is the measure of electrical potential between two points. "Ground" isn't actually a real thing, either; it's just a reference point somewhere in the circuit. Normally, voltages are referenced to ground; it just makes it easier. On cars, ground normally refers to the frame, and is negative, while the power supply (from the battery) is +12V. This isn't universal, though; decades ago, there were some weird cars where the ground (at the frame) was positive, and the power supply was negative.
Let me stop here and get one concept out of the way. The most important basic equation dealing with electricity is Ohm's Law: V=IR. There's three basic things here: voltage, current, and resistance. V is voltage of course (measured in Volts), R is resistance (measured in Ohms), and I is current (measured in Amperes). If you have a constant-voltage source (like a battery), and place a load across it of fixed resistance, then the current can be calculated with this simple equation.
Since electricity is an intangible thing, not visible to the naked eye, it can be a little confusing to try to visualize it. One good analogy I've seen is to compare it to plumbing. Voltage is like water pressure, current is like the flow rate (how much water actually travels through the pipe), and resistance is just a measure of how much resistance there is to water flow. So, for instance, if you have high-pressure water, and a really big pipe, lots of water will travel through. But if you have the same high pressure, but a really small pipe, not very much water will travel through in the same time.
As for circuits, this just means that all electrical things must be circular in a way: unlike plumbing, where you can just pump water from one place to another, current must flow in a circuit. So, for instance, if you have a simple circuit with a battery and a resistor, the current travels from the battery, through the resistor, and back to the battery, in a continuous circuit. By arbitrary convention, current travels from positive to negative (in physics, it's opposite: electrons travel from negative to positive).
"Voltage drop" just refers to the voltage across two points, but commonly refers to the voltage difference across some type of load, and may not necessarily be ground-referenced. So, for instance, suppose you had a simple circuit with a battery, and two resistors connected in series (one in front of the other). If the resistors were equal value, and the battery was 12V, then the voltage drop across each resistor would be 6V.
Of course, if you had a battery that wasn't connected to anything, there would be no voltage drop as it's not in a circuit, and no current is being used.
As for "load", that term is interchangeable with resistance.
Hope this helps, although this is in no way Integra-related and should probably be in a different forum.
to complete a circuit u need pos and neg right..
now theres something called available voltage and source voltage.. source voltage is easy to check because u use the power source which is battery.. now avaiable voltage u have to use a ground and one of the power source of the circuit... how is available votage and source voltage different..
okay.. voltage drop.. is pressure used.. so only time voltage drop is when its under load like a light...
so if voltage drop is because of load and resistance causes the load.. so basicially.. voltage drop, resistance stay the same.. but load increase right?
kinda confused..</TD></TR></TABLE>
If your course used terminology like this, I can see why you're confused.
There's no such things as "available voltage" or "source voltage", at least these aren't any commonly used terms. There's just "voltage". Voltage is the measure of electrical potential between two points. "Ground" isn't actually a real thing, either; it's just a reference point somewhere in the circuit. Normally, voltages are referenced to ground; it just makes it easier. On cars, ground normally refers to the frame, and is negative, while the power supply (from the battery) is +12V. This isn't universal, though; decades ago, there were some weird cars where the ground (at the frame) was positive, and the power supply was negative.
Let me stop here and get one concept out of the way. The most important basic equation dealing with electricity is Ohm's Law: V=IR. There's three basic things here: voltage, current, and resistance. V is voltage of course (measured in Volts), R is resistance (measured in Ohms), and I is current (measured in Amperes). If you have a constant-voltage source (like a battery), and place a load across it of fixed resistance, then the current can be calculated with this simple equation.
Since electricity is an intangible thing, not visible to the naked eye, it can be a little confusing to try to visualize it. One good analogy I've seen is to compare it to plumbing. Voltage is like water pressure, current is like the flow rate (how much water actually travels through the pipe), and resistance is just a measure of how much resistance there is to water flow. So, for instance, if you have high-pressure water, and a really big pipe, lots of water will travel through. But if you have the same high pressure, but a really small pipe, not very much water will travel through in the same time.
As for circuits, this just means that all electrical things must be circular in a way: unlike plumbing, where you can just pump water from one place to another, current must flow in a circuit. So, for instance, if you have a simple circuit with a battery and a resistor, the current travels from the battery, through the resistor, and back to the battery, in a continuous circuit. By arbitrary convention, current travels from positive to negative (in physics, it's opposite: electrons travel from negative to positive).
"Voltage drop" just refers to the voltage across two points, but commonly refers to the voltage difference across some type of load, and may not necessarily be ground-referenced. So, for instance, suppose you had a simple circuit with a battery, and two resistors connected in series (one in front of the other). If the resistors were equal value, and the battery was 12V, then the voltage drop across each resistor would be 6V.
Of course, if you had a battery that wasn't connected to anything, there would be no voltage drop as it's not in a circuit, and no current is being used.
As for "load", that term is interchangeable with resistance.
Hope this helps, although this is in no way Integra-related and should probably be in a different forum.
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