Friends...

[Neoteny]

Is there some ignore list I can put you on?

Of course. But then your view of the forum becomes 20% less awesome.

And I'm still taking physics, and not understanding it. So good luck with that, Nappy. If I had to guess, coils increase the resistance, so if my equation of V=IR is correct, then increasing R increases V. Additionally, I=V/R. If you assume that voltage is constant, then increasing R decreases I. But, since R has an effect on V, I wouldn't say that is the case, and increasing R increases both I and V. That's the best I've got. Take all this with a grain of salt, however.

Meh, good enough. Personally I've just written a note that surely conservation of energy means that if you can increase the number of coils to improve the joules/coulomb, surely coulombs pushed past/second decreases as the resistance rises...

OR: maybe since current is caused by magnetic field lines cutting a wire, you get lower voltage but higher current?

Either way, P=VI means that it can;'t increase voltage and current. And bloody OCR claims it does. Oh well. This is the same textbook which claims that "there are more synapses in your brain than atoms in the universe". And its the only thang between me and my GCSE in coupla months...*gulp*.

I dunno...it's all too confusing. Ah well..you know what they say: "If it moves its biology, if it smells its chemistry, if it refuses to work its physics"

Fucking OCR.

[Napoleon Ier]

Meh, good enough. Personally I've just written a note that surely conservation of energy means that if you can increase the number of coils to improve the joules/coulomb, surely coulombs pushed past/second decreases as the resistance rises...

OR: maybe since current is caused by magnetic field lines cutting a wire, you get lower voltage but higher current?

Either way, P=VI means that it can;'t increase voltage and current. And bloody OCR claims it does. Oh well. This is the same textbook which claims that "there are more synapses in your brain than atoms in the universe". And its the only thang between me and my GCSE in coupla months...*gulp*.

I dunno...it's all too confusing. Ah well..you know what they say: "If it moves its biology, if it smells its chemistry, if it refuses to work its physics"

Fucking OCR.

Dude...if you knew...

The shit we have to do. Arghhh...


I'll quote a question from a 2004 English spec A paper: (This is an AQA run paper, but same vein):

"How do the pictures in this advert make the car look more desirable?"

HOW IS THAT AN ENGLISH PAPER?! I DROPPED ART FOR A REASON DAMMIT!



"OCR-Recognising Aceivement"

...then doing its darndest to stifle it.

http://www.ocr.org.uk/index.html

Look at the site...so PC with all their ethnics...I hate these people.

[hecter]

Everything increases R. Coils are similar to Capacitors in that they store energy, they just do it in a different way.

Also, Voltage is generally fixed, so it would actually decrease I, not increase V.

Ultimately, I wish I new more about capacitors and coils and the inner workings of transistors and all that fun stuff, but I don't.

[Napoleon Ier]

Everything increases R. Coils are similar to Capacitors in that they store energy, they just do it in a different way.

Also, Voltage is generally fixed, so it would actually decrease I, not increase V.

Ultimately, I wish I new more about capacitors and coils and the inner workings of transistors and all that fun stuff, but I don't.

Voltage isn't fixed in a generator though...we're basically saying: what happens to voltage AND current when a magnet (moving at same speed same strength etc...) cuts MORE wires with its field lines?

Both can't increase, since that violates principle of conservationof energy. But my Physics for OCR GSCE textbook says both do...so I'm monumentally confused. Oh, and fucked for this summer...unless New Labour decide to mess the grade-boundaries again to look good.

[Fircoal]

also, how do we know when we're on other people's friends lists?

I don't think you do...

that is indeed disturbing...

*checks for firoal stalkers*...

who? me? Where?

[kalishnikov]

I will, but one condition: as a hard sciences man, can you confirm or deny for me that the following statement from my physics OCR GCSE textbook is a load of bollocks: "Ways to increase voltage and current in a generator:
Stronger magnet
Rotate magnet faster
etc...so far so good, but it also lists:
Increase number of coils in the wire

That's only gonna do anything for the voltage, right?

I wouldn't ask, but I don't have a physics teacher any more, because he buggered off last term leaving some french teacher from Ireland to cover. Who doesn't know any physics.

Correct, increasing number of coils in the wire in the generator should only effect voltage assuming you're not increasing amount of wire, just amount of coils. If also increasing the amount of the wire, it may affect both requisites but I'm not sure, would probably depend on conductivity of said wire material. Fair warning: I'm in no way, shape or form qualified to answer this question, I'm an English nerd not a tech nerd, but I do have a basic working knowledge of physics.

All I wanted to know was what the friend thing did, lol.

[hecter]

Everything increases R. Coils are similar to Capacitors in that they store energy, they just do it in a different way.

Also, Voltage is generally fixed, so it would actually decrease I, not increase V.

Ultimately, I wish I new more about capacitors and coils and the inner workings of transistors and all that fun stuff, but I don't.

Voltage isn't fixed in a generator though...we're basically saying: what happens to voltage AND current when a magnet (moving at same speed same strength etc...) cuts MORE wires with its field lines?

Both can't increase, since that violates principle of conservationof energy. But my Physics for OCR GSCE textbook says both do...so I'm monumentally confused. Oh, and fucked for this summer...unless New Labour decide to mess the grade-boundaries again to look good.

Sure it can, you increase Voltage, you increase current. Just think about this:
You've got a 100 ohm resistor hooked up to a 10V PSU. That means that the current is 0.1A. Increase the voltage to 20V, the resistance stays the same, so in order for the equation to be true, that means that the current pops up to 0.2A.
If this magnet is cutting wires (not sure how that works, but meh) though, you're reducing resistance, so the current rises to compensate. Voltage stays the same.

[Neoteny]

I believe the 3rd law of thermodynamics states that "in a closed system, Neoteny is always correct." Amiwrong?

[hecter]

See, I think the issue is you guys are thinking that Voltage, Resistance and Current are distinctly different things that are isolated from each other. That's not the case. If one changes, another changes too. Hence why V=IR works. Also note that you say that energy cannot be created or destroyed blah blah blah. That's true... However, since you're adding more electrical energy with this magnet (you're saying voltage) at the same time, you are also adding more current. It's impossible to *just* change one thing, you HAVE to change something else as well to compensate. Well, you don't have to, but you'll be wrong if you don't... The circuit will still change itself no matter what your calculations say

Anyway, I hoped that helped... I'm not great at explaining things, but I do know the odd thing about this kinda stuff.

[reminisco]

Sure it can, you increase Voltage, you increase current. Just think about this:
You've got a 100 ohm resistor hooked up to a 10V PSU. That means that the current is 0.1A. Increase the voltage to 20V, the resistance stays the same, so in order for the equation to be true, that means that the current pops up to 0.2A. Voltage stays the same.

more importantly, the flux capacitor was designed to kick in at 88 mph, so even if the oscillator overthruster fails on initial activation, you've still got the flip-flop override device to fall back on.

[hecter]

Sure it can, you increase Voltage, you increase current. Just think about this:
You've got a 100 ohm resistor hooked up to a 10V PSU. That means that the current is 0.1A. Increase the voltage to 20V, the resistance stays the same, so in order for the equation to be true, that means that the current pops up to 0.2A.

more importantly, the flux capacitor was designed to kick in at 88 mph, so even if the oscillator overthruster fails on initial activation, you've still got the flip-flop override device to fall back on.

I wouldn't trust the flip-flop override... It'll f*ck you up good man...

[Neoteny]

I still think I'm right...

[hecter]

I still think I'm right...

Fair enough...

[Neoteny]

I honestly haven't done electricity since high school physics. I'm taking my second semester of intro physics now, and we haven't hit it yet, so I'm probably just talking out of my ass.

[hecter]

I honestly haven't done electricity since high school physics. I'm taking my second semester of intro physics now, and we haven't hit it yet, so I'm probably just talking out of my ass.

I'm taking a few basic courses in school... It's fun

[Neoteny]

I honestly haven't done electricity since high school physics. I'm taking my second semester of intro physics now, and we haven't hit it yet, so I'm probably just talking out of my ass.

I'm taking a few basic courses in school... It's fun

I'll leave it to you then... I just want to pass.

[Napoleon Ier]

I honestly haven't done electricity since high school physics. I'm taking my second semester of intro physics now, and we haven't hit it yet, so I'm probably just talking out of my ass.

I'm taking a few basic courses in school... It's fun

I'll leave it to you then... I just want to pass.

See, I just don't get people who choose to do triple science maths for A2...go with something that will give you a little room for your own creative and intellectual dvelopment. See? English Lit. The real Man's subject.

[hecter]

I got a healthy mix of both... Next year, it's two English courses, but also two maths. A physics course, but also an animation course. Computer programming, but a game development.