Resistance and ohms

[SpiritBear]

When I bought my starter kit, the website gave options for several things. There was an option for Resistance but just one selection: 2.8 ohm. So I checked that box, not really knowing what "Resistance" is.

Under Replacement Heads, the site offered two choices: 1.8 ohm and 2.8 ohm <---- for this, I picked the 1.8 ohm

What does Resistance mean, and did I do an okay thing or should I have picked Replacement Heads in the 2.8 ohm to match the Resistance?

 

[Hoosier]

Resistance is a measure of how resistant something is to the flow of electricity and the unit of measure is Ohms. The higher the number the higher the resistance. But this is really about power, and it all relates. By picking a 1.8 Ohm replacement head instead of the 2.8 Ohm head you will have a higher power going to the coils. Power is heat is Watts.

Watts = Voltage * Voltage / Resistance So for a fixed voltage as the resistance goes up, the wattage goes down and as the resistance goes down the wattage goes up. (This assumes the voltage source has enough current capacity to support this.)

If you use the 1.8 Ohm head at the same voltage you used the 2.8 Ohm head you should notice more vapor being produced and more warmth in the vapor. I don't know if that is what you want or need so I have no idea if it is an okay thing for you.

 

[El_tecolote]

This chart might also be of some help.

Safe Vaping Power | Voltage | Resistance | Ohm Chart

 

[SpiritBear]

Thank you both -- I've saved the comments as well as the chart to my computer for solid future reference.

Folks here are The Best, bar none!