Shock Value B

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Avis_de-Incendia
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Re: Shock Value B

Postby Avis_de-Incendia » August 28th, 2009, 11:07 am

The confusing part about this all is that if you increase the resistance of a circuit, the electromagnitive force would increase.

Common sense would dictate that shouldn't be...no?
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Re: Shock Value B

Postby fleet130 » August 28th, 2009, 5:09 pm

The total voltage in the circuit stays the same. Only the voltage used by individual components changes. Here's an example using the formulas for series circuits:

Series Circuits Formulas:

Ohm's Law (stated 3 different ways):
E = I x R
I = E/R
R = E/I

E(total) = E(R1) + E(R2).... + E(Rn)
R(total) = R1 + R2.... + Rn
I(total) = I(R1) = I(R2).... = I(Rn)

Circuit 1
Image

To learn everything about this circuit we can use a chart. Start by entering what we know:
Image

Using the formula: R(total) = R1 + R2.... + Rn we can find the total resistance:
Image

We can now use Ohm's Law in the form of I = E/R to find the total current in the circuit
Image

From the formula: I(total) = I(R1) = I(R2).... = I(Rn) we can now determine the current in both resistors:
Image

Lastly, we can use Ohm's Law E = I x R to find the voltage used by each of the resistors
Image

Note: Power (P) is measured in Watts (W). The formula is: P = I x E

Circuit 2
Image

In Circuit 2 resistor #1 is increased to 9 ohms with all other parameters remaining the same. Calculate the values for this circuit just as in Circuit 1.
Results are:
Image

Note: The voltage used by resistor 1 increased and the voltage used by #2, the current and total power decreased.
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Re: Shock Value B

Postby acanoli » September 10th, 2009, 10:04 am

Anyone have any good resources? Or know what's included in the rules? I know nothing as of now. :D

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Re: Shock Value B

Postby Iustitia » September 11th, 2009, 11:34 am

Anyone have any good resources? Or know what's included in the rules? I know nothing as of now. :D

There's a magical place called the "Wiki" where they have all the answers to all your questions. almost. :D
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Re: Shock Value B

Postby EastStroudsburg13 » September 11th, 2009, 1:41 pm

Try this link for the Shock Value Wiki. Also, fleet130's post seems pretty good up there as well. ;) If you feel like waiting for just a little bit more until you get the rules, or if you have the rules already, look up the stuff on there. Sorry I can't tell you more at this point, I don't have the rules myself.
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Re: Shock Value B

Postby robotman » September 25th, 2009, 5:57 pm

I was wonder what people think this event is going to be mainly about
Circuits and electrical concepts or magnetism?
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Re: Shock Value B

Postby Iustitia » September 30th, 2009, 1:14 pm

How do you make a lightbulb shine the brightest? (optimal settings)
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Re: Shock Value B

Postby robotman » September 30th, 2009, 2:04 pm

well it depends on the light bulb you have
the optimal light would be the voltage the light is meant for so an LED would need a battery that coincides with what it is rated
but as for a simple circuit it would look like this
Image

yes there are other ways to draw a light bulb symbol
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Re: Shock Value B

Postby andrewwski » September 30th, 2009, 3:47 pm

How do you make a lightbulb shine the brightest? (optimal settings)
The higher the voltage the brighter the bulb will shine.

But too much voltage and you'll burn it out.

LED's are completely different than light bulbs, please do not confuse them. The principle of voltage vs. brightness still mainly applies. The greater the voltage, the brighter it will shine. However, most LED's have a narrow acceptable voltage - too much and you'll burn them (and it'll really smell). The similarities end right about there.

LED's are diodes and also have a minimum threshold voltage - too little voltage and they won't conduct.

Generally you'll want to run a light bulb at close to the voltage it is specified for. Running it at the maximum voltage will make it shine the brightest.

However, if you want a bulb that shines brighter, get a higher wattage bulb of the same voltage.

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Re: Shock Value B

Postby robotman » October 2nd, 2009, 2:59 pm

hey guys i need some help finding tests for my event tutor does anyone have any/and where to find them?
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