Question about electricity

[NYguardianangel]

Prove it. I've been living under your porch for six months, and have seen no such evidence of conductivity.

Sorry Princess, wrong front porch...
Lots of connectivity and I conduct my own electrical experiments...
heavy duty experiments... lol
http://www.fuckingmachines.com/site/shoots.jsp

 

[FAST]

Transformation

transformers work with DC if you alter the voltage in intervals which can be done

It is this alteration that causes magnetic flux

Then it ain't DC anymore !!!

FAST

 

[Yoga Face]

James has hit the nail on the head. In a transformer power (watts) is the same on both sides of the (perfect) transformer and since Power = Volts * Amps

Volts * Amps => Volts * Amps where '=>' is the transformer.

Lets look at 100 Watts in the form of 100 Volts / 1 Amp and we double the output voltage 100V* 1 Amp => 200V * 0.5 Amps Equal Power both sides.

Now lets go way higher in voltage - lets go up by 25,000 times 100V*1 Amp => 250,000V*0.000040A

I am puzzled as to why both transformer coils have the same wattage although i accept the answer

Put it into another transformer to bring it down and you virtually have all the power you started with. That is why power lines run at such high voltages and why Tesla (AC) not Edison (DC) won the power race.

correct

 

[Yoga Face]

Then it ain't DC anymore !!!

FAST

yes it is

AC is the alteration of magnetic fields

DC is the chemical storage of excess electrons

altering the DC current does not change its basic DC nature

 

[wigglee]

Potency = Ejaculate flow X Thrust

 

[FAST]

Direct current

yes it is

AC is the alteration of magnetic fields

DC is the chemical storage of excess electrons

altering the DC current does not change its basic DC nature

AC means that the voltage is alternating from zero to peak voltage for the positive half of the cycle, then goes to zero again, then rises to peak voltage in the OTHER polarity ,...negative and back to zero,...and so and so on, in our case for power dist.,...60 times per second.

DC,...on the other hand, can come from many sources other than batteries,...every peace of electronics you have plugged into the wall socket has DC, by rectifying AC.

Putting ANY form of DC into a xfmr would saturate the core of the xfmr.

FAST

 

[bishop]

not clear

if you start with 10v and 2 ohms you start with

10v=5amps*2ohms

Step up the voltage to 20v then you have

20v=10amps*2ohms

you have the amps decreasing somehow

You are just taking the load side and not accounting for the increased current consumption on the supply side of the transformer. If you double the voltage, you will double the current going through the 2ohm resistor, the net result is you quadruple the power consumed by the resistor. The battery that is supplying the 10v is still supplying 10v, but it is now supplying 20 amps, 4x the current. The 10v battery sees the load as 0.5 ohms through the transformer.

Now if you were to use a transformer to drop the voltage by half, the resistor will see 5v and have 2.5amp run through it, consuming 12.5w. The 10v battery now sees a load of 4 ohms through the transformer and is supplying 1.25amps to the transformer, supplying 12.5w.

 

[FAST]

What goes up...must come down

WOW! Good thing you guys didn't over complicate this thing and went over the tangent!

This is very simple:
According to the law of conservation of energy, energy is transformed, not created or destroyed, in other words, you can not get more that what you put in (If you find a way to, you will become the richest man on earth faster than my flux capacitor would blow up and leak inside Miss Lola's cervix).
The energy that goes into Yogaface's step up transformer has already been created by the power plant. If that power plant created 10000 Watts of energy, this is what is going into the transformer, and this is what comes out of it, no way around it. Others have done a good job of explaining the math behind the power equation
Ohm's Law V=IR is not applicable in this case because you are not calculating loads. Do not make the mistake that current (Amps) is a function of resistance (ohms).

OK up and till the ohm's law thing,...resistance has a direct function in respect to current,...increase resistance in a circuit,...and current goes down,...and versa visa of coarse.

FAST

 

[Mod100]

This thread is turning out to be quite shocking.

 

[shakenbake]

But if the amps (current) goes down the voltage goes down as Voltage = amps *ohms but increasing or decreasing amps or ohms should not make any difference as the voltage always remains constant (in AC which is what we are discussing) if amps go down then the ohms (resistance) have gone up which is what caused the amps to go down


For example if the power line is cut the resistance to electric flow (ohms)becomes infinite which makes the amps zero as electricity stops flowing


The spinning turbine is creating the Voltage and decreasing, or increasing, the amps does not affect the turbine

Don't get hug up on just one physical law.

V*I = P

Voltage times current equals power. Multiply that by time, and you have energy. Energy is neither created nor destroyed, but converted. So, you increase voltage, and teh current goes down. The reason that they raise the voltage is to reduce the ohmic power losses as the energy is transported across the cables.

 

[shakenbake]

I think you are making this too complex

A transformer is a device that transfers electrical energy from one coil to another

It does this by the coil that is charged (primary) creating a magnetic field that constantly varies in strength (because AC is created by positive then negative magnets inducing voltage as electricity creates magnetism and vice versa) through the secondary coil. This varying magnetic field induces a voltage in the secondary coil. This effect is called inductive coupling.

The number of windings in the secondary coil decides how stepped up (or down) the voltage will be


By merely adding windings you increase voltage

Is this not free energy?

The energy is transferred from the magnetic field of the primary to the secondary coil by magnetic induction. There is no free lunch anywhere in the universe, at least in this universe.

 

[FAST]

Smaller is better

The reason that they raise the voltage is to reduce the ohmic power losses as the energy is transported across the cables.

AND more importantly,...able to use smaller cables.

A side note, DC would be better for long transmission lines, less losses,...but more difficult to deal with in the end.

FAST

 

[wigglee]

the simple bottom line here is power. It is all about power (watts). Don't get hung up on ohm's law which doesn't even mention power.

 

[FAST]

Laws

Yes, and no. Resitance only limits the current flow through a circuit. From any given power source you have so much juice available, say a battery at 1.5V at 0.5A. You can put a 10 ohm resistance and get 0.15 Amps, and your battery will work quite happy with it, but put a 1ohm resistance and you do not get 1.5 A (though your 1 ohm load requires it to work), because your battery can only supply 0.5A, you will overheat the battery that is being drained, and your load won't budge
So, though, they are interrelated, one is not the function of the other.

IF you have a car battery that can deliver 100 amps, what do you think would happen in your theoretical circuit,... there would be a direct interrelation.

Of coarse you could also add another variable in your circuit,…if the resistor’s resistance increased as it’s temperature rose,…the current would go down.

Ohm's law always works,... if applied properly !!!.

We are not talking about our legal system here.

FAST

 

[FAST]

Not applicable

the simple bottom line here is power. It is all about power (watts). Don't get hung up on ohm's law which doesn't even mention power.

agreed !!!

Fast

 

[mrsCALoki]

Not that long ago the L&M decided I needed to understand why the ice from an iceberg was colder than normal ice. He also thought it was important that I understand why iceberg ice often makes noise just sitting there in my glass.

This is even more confusing.

 

[basketcase]

I think you are making this too complex

A transformer is a device that transfers electrical energy from one coil to another

It does this by the coil that is charged (primary) creating a magnetic field that constantly varies in strength (because AC is created by positive then negative magnets inducing voltage as electricity creates magnetism and vice versa) through the secondary coil. This varying magnetic field induces a voltage in the secondary coil. This effect is called inductive coupling.

The number of windings in the secondary coil decides how stepped up (or down) the voltage will be


By merely adding windings you increase voltage

Is this not free energy?

VIP already gave you the answer.

Power = Voltage x Current. (Power = Energy/second) A transformer is an energy converter. To increase the voltage, you decrease the current.

I'll throw some numbers:

Lets say that your original stats were 100V and 10A. The transformer changes both so it might end up as 1000V and 1 A. The energy in both cases is equal.

Of course in a real life situation, some energy is lost in the transformation.


The reason they do this is because far less energy is lost in transmission at a high voltages.

 

[basketcase]

To go into more basic concepts:

Voltage is defined as Joules per Coulomb. (energy per unit charge). Current is Coulombs per second.

When multiplied, you get Joules per second which is power (Watts).

 

[basketcase]

not clear

if you start with 10v and 2 ohms you start with

10v=5amps*2ohms

Step up the voltage to 20v then you have

20v=10amps*2ohms

you have the amps decreasing somehow

This is not a conservation of energy situation. All you have done is replace a 10V battery with a 20V one. That makes it a very different situation that a transformer.

 

[basketcase]

transformers work with DC if you alter the voltage in intervals which can be done

It is this alteration that causes magnetic flux

Transformers won't work with DC. It has to be AC because a the energy is transferred through a changing magnetic field which requires a changing electrical field. In a DC circuit, the electric field is constant.