Shock Value B
 blue cobra
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Re: Shock Value B
I had an idea for the wiki, and since it's what I would consider a fairly large change, I thought I'd run it by some people first.
I was thinking I could replace the current 4 Series Circuits Formulas with a section titled Circuits Formulas. In the beginning there would be formulas applicable to circuits in general, such as Ohm's law and Kirchoff's laws. Then the current 4 Series Circuits Formulas would become a subset of that. Another subset would be Parallel Circuit Formulas, and could consist of this image and one or two examples, modeled after the current 4 Series Circuits Formulas. I also feel that this image is better to represent the series circuit formulas. The chart is much easier, for me at least, to understand than a word description. Also, I thought this section might be better after Episode VII, rather than where it is now.
So, what do you think? Should I go ahead with it? Any comments or suggestions?
I was thinking I could replace the current 4 Series Circuits Formulas with a section titled Circuits Formulas. In the beginning there would be formulas applicable to circuits in general, such as Ohm's law and Kirchoff's laws. Then the current 4 Series Circuits Formulas would become a subset of that. Another subset would be Parallel Circuit Formulas, and could consist of this image and one or two examples, modeled after the current 4 Series Circuits Formulas. I also feel that this image is better to represent the series circuit formulas. The chart is much easier, for me at least, to understand than a word description. Also, I thought this section might be better after Episode VII, rather than where it is now.
So, what do you think? Should I go ahead with it? Any comments or suggestions?
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 robotman
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Re: Shock Value B
blue cobra wrote:I had an idea for the wiki, and since it's what I would consider a fairly large change, I thought I'd run it by some people first.
I was thinking I could replace the current 4 Series Circuits Formulas with a section titled Circuits Formulas. In the beginning there would be formulas applicable to circuits in general, such as Ohm's law and Kirchoff's laws. Then the current 4 Series Circuits Formulas would become a subset of that. Another subset would be Parallel Circuit Formulas, and could consist of this image and one or two examples, modeled after the current 4 Series Circuits Formulas. I also feel that this image is better to represent the series circuit formulas. The chart is much easier, for me at least, to understand than a word description. Also, I thought this section might be better after Episode VII, rather than where it is now.
So, what do you think? Should I go ahead with it? Any comments or suggestions?
As long as nothing major gets deleted any wiki edit is always fine

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Re: Shock Value B
Theoretical current anyone???? really confused
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 blue cobra
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Re: Shock Value B
2. A 10 ohm resistor, a 15 ohm resistor, and a 5 ohm resistor are connected in parallel across a 90 V battery.
a. Draw a schematic diagram of the circuit.
Would we have to write the resistance next to the zigzag resistor symbol?
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 robotman
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Re: Shock Value B
blue cobra wrote:2. A 10 ohm resistor, a 15 ohm resistor, and a 5 ohm resistor are connected in parallel across a 90 V battery.
a. Draw a schematic diagram of the circuit.
Would we have to write the resistance next to the zigzag resistor symbol?
Since they did give you the resistance I would label the each resistor
 blue cobra
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Re: Shock Value B
Hamtown009 wrote:Theoretical current anyone???? really confused
I've never heard of that before. Where did you see it?
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 robotman
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Re: Shock Value B
blue cobra wrote:Hamtown009 wrote:Theoretical current anyone???? really confused
I've never heard of that before. Where did you see it?
Could you mean Theoretical current Flow?
if so it is simply that the electrons being negative will flow from the negative terminal of the power source to the positive due to the fact that they are attached to it(the positive terminal)

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Re: Shock Value B
It was on a test... i'll tell you the exact problem tomorrow
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 smarticle13
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Re: Shock Value B
I don't think so
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Re: Shock Value B
The problem for theoretical current was:
List the resistnace of each resistor solve for the theoretical current and voltage drop for each resistor in the circuit. There was a circucit that was parallel. The resistances were the following: R155 R218 R310 R475 R5100 R615 R722 . how would you then calculate the theoretical current and voltage drop???
List the resistnace of each resistor solve for the theoretical current and voltage drop for each resistor in the circuit. There was a circucit that was parallel. The resistances were the following: R155 R218 R310 R475 R5100 R615 R722 . how would you then calculate the theoretical current and voltage drop???
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 andrewwski
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Re: Shock Value B
I'm assuming every resistor was connected in parallel?
In that case I'm assuming they gave you the total voltage? In that case it's really easy. You know voltage in parallel always is the same, so just apply Ohm's Law to each individual resistor to find the current.
If you want to find total current, add the current of each resistor together (Kirchoff's Current Law) or find the total resistance (using the formula for resistance in parallel) and apply Ohm's Law.
In that case I'm assuming they gave you the total voltage? In that case it's really easy. You know voltage in parallel always is the same, so just apply Ohm's Law to each individual resistor to find the current.
If you want to find total current, add the current of each resistor together (Kirchoff's Current Law) or find the total resistance (using the formula for resistance in parallel) and apply Ohm's Law.
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 blue cobra
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Re: Shock Value B
If a component in a circuit was rated at 1 watt, would that mean that it uses 1 joule in 1 hour?
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Re: Shock Value B
The values of the resistors that are given to you are nominal. All resistors have a tolerance. For example, the R5=100 ohms may have a 5% tolerance. That means the actual resistance measured may be as low as 95 ohms and as high as 105 ohms. The "theoretical" current and voltage drop across this resistor is calculated with the nominal value of 100 ohms. When you put a meter across the resistor the readings you take won't exactly match the "theoretical" current or voltage you calculated because of this tolerance. Furthermore, batteries put out more voltage than they are listed at. A fresh 1.5 volt battery puts out 1.6 volts, a 6 volt battery puts out 6.4 volts, a 9 volt battery puts out 9.6 volts, and a 12 volt battery puts out 12.8 volts. Again the "theoretical" calculation will use the nominal voltage of the battery and actual readings will not match.
1 watt = 1 joule/second
1 watthour= 1 joule/second * 3600 seconds/hour = 3600 joules
normally expressed in Kilowatthours
1 KWhour = 1000 joules/sec * 3600 seconds = 3.6 x 10^6 joules
1 watt = 1 joule/second
1 watthour= 1 joule/second * 3600 seconds/hour = 3600 joules
normally expressed in Kilowatthours
1 KWhour = 1000 joules/sec * 3600 seconds = 3.6 x 10^6 joules
 blue cobra
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Re: Shock Value B
Thank you.
I was researching batteries, and I found plenty about wet cells, but is a dry cell basically just the same thing as a wet cell except that the electrolyte is in a paste? And since lemon juice is apparently an electrolyte (is there a specific reason why?) that's why when you stick two terminals of different metals (do the types of metals matter?) into a lemon you get voltage, correct?
And on my reference sheet, I have a resistor color code chart, formulas, and diagrams of a DC motor, a wet cell, and magnetism around a conducting wire. Is there anything I'm forgetting?
I was researching batteries, and I found plenty about wet cells, but is a dry cell basically just the same thing as a wet cell except that the electrolyte is in a paste? And since lemon juice is apparently an electrolyte (is there a specific reason why?) that's why when you stick two terminals of different metals (do the types of metals matter?) into a lemon you get voltage, correct?
And on my reference sheet, I have a resistor color code chart, formulas, and diagrams of a DC motor, a wet cell, and magnetism around a conducting wire. Is there anything I'm forgetting?
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