Wattage question involving maths and physics

[RainbowPunk]

I am hoping to check my understanding of coil resistance and the power and wattage

Basis for my calculations:
I use a 0.4ohm coil , that's the resistance
my wattage is set to 28W - that's the power

so V^2 / R is W
so 0.4 ohm * 28W = 11.2V^2 so Voltage = 3.34V

and now I know the Voltage I can calculate the Amps 3.34V/0.4ohm = 8.35 Amps

So here is what I want to check... I have a different strength of coil that I could use when this coil dies. It's 1.2ohm (came in the box with the sub ohm 0.4 coil)

so I am thinking I will have the same vape with the 1.2ohm coil if I increase the power to 84W ?
because 84W * 1.2ohm = 100 (V^2)
so that's keeping the current Ampage the same at 8.35Amps (8.35Amp * 1.2ohms = 10V)

please can you confirm if I have understood it correctly and if it will be ok to use the 1.2 coil for a similar (and safe) vape?
I am guessing it will drain my battery faster... but I hate to waste a perfectly good coil !

thank you!

 

[oldhippydude]

https://www.planetofthevapes.co.uk/...lating-amp-load-using-a-regulated-mod.128294/

 

[Rickster]

It should say on the 1.2ohm coil what the recommended watts is for that coil... if not it will be on the manufacturers site......it won't be anywhere near 84 watts.

 

[mattyk2010]

I am hoping to check my understanding of coil resistance and the power and wattage

Basis for my calculations:
I use a 0.4ohm coil , that's the resistance
my wattage is set to 28W - that's the power

so V^2 / R is W
so 0.4 ohm * 28W = 11.2V^2 so Voltage = 3.34V

and now I know the Voltage I can calculate the Amps 3.34V/0.4ohm = 8.35 Amps

So here is what I want to check... I have a different strength of coil that I could use when this coil dies. It's 1.2ohm (came in the box with the sub ohm 0.4 coil)

so I am thinking I will have the same vape with the 1.2ohm coil if I increase the power to 84W ?
because 84W * 1.2ohm = 100 (V^2)
so that's keeping the current Ampage the same at 8.35Amps (8.35Amp * 1.2ohms = 10V)

please can you confirm if I have understood it correctly and if it will be ok to use the 1.2 coil for a similar (and safe) vape?
I am guessing it will drain my battery faster... but I hate to waste a perfectly good coil !

thank you!

Calculations might work out where you need to be power wise but they won't explain the important part DONT DO IT!!!

The wire in your 1.2ohm coil and the wicking won't be able to cope with that level of power and your either gonna get the worst dry hit known to man or even set fire to the coil and inhale flames [emoji4]

Oh and if you do decide to please video it for a laugh [emoji23]

 

[MrDJ]

I am hoping to check my understanding of coil resistance and the power and wattage

Basis for my calculations:
I use a 0.4ohm coil , that's the resistance
my wattage is set to 28W - that's the power

so V^2 / R is W
so 0.4 ohm * 28W = 11.2V^2 so Voltage = 3.34V

and now I know the Voltage I can calculate the Amps 3.34V/0.4ohm = 8.35 Amps

So here is what I want to check... I have a different strength of coil that I could use when this coil dies. It's 1.2ohm (came in the box with the sub ohm 0.4 coil)

so I am thinking I will have the same vape with the 1.2ohm coil if I increase the power to 84W ?
because 84W * 1.2ohm = 100 (V^2)
so that's keeping the current Ampage the same at 8.35Amps (8.35Amp * 1.2ohms = 10V)

please can you confirm if I have understood it correctly and if it will be ok to use the 1.2 coil for a similar (and safe) vape?
I am guessing it will drain my battery faster... but I hate to waste a perfectly good coil !

thank you!

can you clarify what mod and tank you are using or are you using a RDA where you build your own coils.

the only time you will need these calculations is for a unregulated mechanical (mech) mod which has no protection.
regulated mods do everything for you and if you push them too much it should auto cutout or give you a nasty dry hit to the back of your throat.
so if these are ready made shop coil you just screw in and fill the tank.
the box or coil will have the ohm with a wattage range.
1.2 is more for mouth to lung and depending on the coil the max wattage should be around 22-24watts max but it does vary from make to make.
but until we know exactly what you are using mod, tank or rda its all guess work.

 

[Phat Barstood]

Hmm,more reply's than I thought this post would get especially with the words maths and physics in it...

 

[Mr Ripple]

Move some decimal points please.
8.4w

 

[RainbowPunk]

Calculations might work out where you need to be power wise but they won't explain the important part DONT DO IT!!!

The wire in your 1.2ohm coil and the wicking won't be able to cope with that level of power and your either gonna get the worst dry hit known to man or even set fire to the coil and inhale flames [emoji4]

Oh and if you do decide to please video it for a laugh [emoji23]

Wow, glad I asked first then lol ! thanks for the heads up - might just get some more 0.4 coils to be on the safe side !!!

 

[MrDJ]

Wow, glad I asked first then lol ! thanks for the heads up - might just get some more 0.4 coils to be on the safe side !!!

youve still not mentioned what kit you are using.

Move some decimal points please.
8.4w

uwell crown 1 - 1.2 single = 10-30w
kanger subtank - 1.2 ohm - 12 - 25 watt
only 1.2 coils ive ued.

 

[RainbowPunk]

can you clarify what mod and tank you are using or are you using a RDA where you build your own coils.

the only time you will need these calculations is for a unregulated mechanical (mech) mod which has no protection.
regulated mods do everything for you and if you push them too much it should auto cutout or give you a nasty dry hit to the back of your throat.
so if these are ready made shop coil you just screw in and fill the tank.
the box or coil will have the ohm with a wattage range.
1.2 is more for mouth to lung and depending on the coil the max wattage should be around 22-24watts max but it does vary from make to make.
but until we know exactly what you are using mod, tank or rda its all guess work.

the mod is regulated, (punk 220w) and it's Aspire Tigon tank with 0.4coil (shop bought, not built anything myself ...yet!!)
I have looked in the instructions and it says the wattage range for the 1.2ohm coil is 10-12W so I was way out with my calculations... feel a compulsion to understand why (so will look more in depth at the link with the calculations and explanations) but it's comforting to know what NOT to do hehe so thank you again!!