single vs dual coil wattage question

[dielonnn]

Okay so ive been trying to under stand how the power is divided in dual coils
I cane across a closed thread that explained this

A 1.5ohm dual coil contains 2 x 3ohm coils for a total resistance of 1.5 ohms. The formula for the wattage is the voltage squared/resistance.

So I dont understand, if both coils in a dual coil were 3.0 ohms wouldnt the resistance of the coil be 6.0 ohms?? If not then why I dont get this I always thought if a 1.5 ohms dual coil that meant that mean the resistance of each coil is .75 bc .75 +.75=1.5 idk im confused here please help me understand

 

[MrPlink]

In series wiring dual 3ohm coils would give you a 6ohm total resistance.

Most dual coil setups use a parallel configuration, which is why you divide the resistance instead of adding it

 

[k702]

In series wiring dual 3ohm coils would give you a 6ohm total resistance.

Most dual coil setups use a parallel configuration, which is why you divide the resistance instead of adding it

http://www.e-cigarette-forum.com/fo...ion/422329-series-vs-parallel-dual-coils.html

 

[TheOnyxEgg]

It would be dependent on whether the coils are hooked up in series or parallel (just like speakers).

2 X 3 ohm coils in series = 6 ohm
2 X 3 ohm coils in parallel = 1.5 ohm

In series, an electron going through the circuit will travel from the battery through both coils and back to the battery. (hence double the resistance)

In parallel, an electron only goes through one coil or the other (not both) when going through the circuit.

I guess you could think of it using drinking straws... if you put two straws side by side (parallel) and suck through both at the same time you are going to have less resistance (how much effort it takes to get soda from the glass to your mouth) than using only one straw. If you connect two straws together to make one really long straw you will have twice the resistance of the single straw. Kind of a weird analogy but I think it's sound.

Most multi coil builds I've seen are parallel coils, but I also haven't looked around at a ton of different builds so I'm sure someone else can chime in.

 

[dielonnn]

Haha I liked that analogy

 

[PrimeKB]

It would be dependent on whether the coils are hooked up in series or parallel (just like speakers).

2 X 3 ohm coils in series = 6 ohm
2 X 3 ohm coils in parallel = 1.5 ohm

In series, an electron going through the circuit will travel from the battery through both coils and back to the battery. (hence double the resistance)

In parallel, an electron only goes through one coil or the other (not both) when going through the circuit.

I guess you could think of it using drinking straws... if you put two straws side by side (parallel) and suck through both at the same time you are going to have less resistance (how much effort it takes to get soda from the glass to your mouth) than using only one straw. If you connect two straws together to make one really long straw you will have twice the resistance of the single straw. Kind of a weird analogy but I think it's sound.

Most multi coil builds I've seen are parallel coils, but I also haven't looked around at a ton of different builds so I'm sure someone else can chime in.

Sounds like a good analogy to me haha

 

[MrPlink]

Sounds like a good analogy to me haha

Indeed.
I used to work with tube amps so I had to explain series and parallel impedance a lot and I would use water hoses in my explanation.

 

[Asbestos4004]

+1 on the straw analogy! I typed a scientific answer and deleted it as soon as I read the straw post. Excellent , and I will steal it, use it and take full credit for it. Hell, I may even accuse you of stealing it from me!

 

[DaveP]

Crash course on series and parallel resistance and how they operate in a circuit. It's good basic theory to understand.

Series and Parallel Resistor Circuit Calculations