# Vaping Basics

## Ohm's Law

### Watt - The unit of measure for power created in a circuit representing Wattage (P).

Wattage can be related to the water that is coming out of the other end of the hose.

Most people in every day life use wattage when picking out a light bulb, typically the higher the wattage the brighter the bulb will be.

In regards to Vaping, the higher the wattage or power being delivered to your coil, the more vapor that will be created. Keep in mind, the higher the wattage you use the more airflow will be needed.

### Amp - The standard unit of electric current representing Amperage (I).

An amp is quite a large measure of current flow and you will probably find that most circuits will have milliamps flowing through them - that is one thousandths of an amp.

Due to the high wattage (power) that is creating during vaping we will stick to Amps for the time being.

When water or an electric current flows then a resistance to that flow is encountered, the measurement of resistance is an ohm.

### Definition of Ohm's Law - the principle that the electric current passing through a conductor is directly proportional to the potential difference across it, provided that the temperature remains constant. The constant of proportionality is the resistance of the conductor.

The definition above is quite a mouthful, it simply states that the current passing through a conductor increases if you increase the voltage.

Obvious really - increase the pressure (voltage) and you will find more current will flow.

### Volt - The unit of electromotive force or electric pressure representing Voltage (V).​

The water that flows through a hose can be considered similar to that which flows through an electric wire or atomizer coil.

The current flow in a wire cannot of course come out of a coil like water can leak out of pipes or come out of the tap.

However a force is required to drive it and resistance to this flow is encountered, the flow of current is measured in amps.

### Ohm - The unit by which electrical resistance is measured representing Resistance (R).

The size of the hose can be a direct analogy to the thickness of wire we use when wrapping coils.

The thicker the wire or hose the more amps it will allow it to push and essentially faster throughout the circuit.

Higher ohms = Higher resistance

Lower ohms = Lower resistance

# Voltage

Let's look at a standard Lithium Ion 18650 battery. Fully charged these batteries are capable of outputting 4.2v. If you install a single 18650 into a mechanical, typically a tube device, you will not have the ability to adjust the voltage. This type of device pulls volts straight from the battery without any help from a power converter.

# Resistance

This is a coil or replacement head in your atomizer or tank. Once installed you cannot make any adjustments to it's resistance. Diving a little deeper, when wrapping your own coils:

• The thicker the wire you use the less resistance you will get (this is like having a larger hose allowing more water to flow through)
• The thinner the wire used the more resistance you will have (like having a smaller hose, water will have to fight to push it's way out)
• If we add more wraps to the coil, essentially making the hose longer, this will add more resistance to the coil

Many people like using dual coil atomizers. To touch on this briefly, if you have two coils of the same resistance (same number or wraps and overall length) you essentially opened up your "hose" and you are now able to allow twice the amount water of through it. This now cuts your resistance in half.

• Real life scenario: if you have two 0.4 ohm coils and install them into your device your resistance is technically cut in half and you now have 0.2 ohms of resistance in your circuit.

# Wattage

Wattage is the power that is created throughout the circuit. It is the easiest value to understand because it is the end result of vaping.

# Vaping with a Mechanical Device

Let's say that with a fully charged 18650 our Voltage is 4.2v. The only way this can change is as we vape and the battery discharges voltage. Typically it is best to put your batteries back on the charger when they are no less than 3.3v.

Because our wattage is based on the voltage and resistance we must next introduce a coil or head into the circuit. Depending on the resistance it will adjust the wattage in different ways. If we put less resistance into the circuit this will increase the wattage or power that is created. On the opposite end, the higher the resistance the lower the power that will be created.

Below are two examples of this. You will see that in both examples our voltage is a constant 4.2v. In Example 1 we have a 1.0 ohm coil producing measly 17.64 watts. This would be considered a higher resistance in most cases for vaping. In Example 2 we lowered our resistance to 0.2 ohms and you can now see that our wattage increased to a much larger 88.2 watts. Now this is more like it!

Example 1

Example 2

When using a device, like a mechanical mod, you have no option to adjust the voltage. The only way to create more power is to decrease the resistance of your coil(s).

# Vaping with a Variable Voltage or Variable Wattage device

Above we discussed having to change your resistance if your voltage is constant. In this section we will assume that our resistance is the constant. Now there is plenty of information regarding what types of coils you should use at certain wattage but a lot of it comes to personal preference so let's just talk about the overall premise of ohm's law in regards to a constant resistance.

Every Variable Power device is variable voltage. It must be able to adjust the voltage to increase the wattage. This is once again assuming we have a constant resistance. Once we put on an atomizer or tank it pretty much sets the resistance and we get to increase our power based on that. Keep in mind that most atomizers will hit a max wattage limit due to airflow capabilities. If you can't supply enough airflow to your coils you most likely need to turn your device down to prevent burning.

In the following examples we will work with a 0.2 ohm coil as our constant. The only way to change this is by either adding more wraps to your coil (raising the resistance) or removing wraps (lowering your resistance). Regardless though, once you are set on a coil resistance that is the constant in your set up. Example 3 shows our 0.2 ohm coil set to 60 watts. The voltage needed to get to this wattage is only 3.46v. Now if we increase our wattage to let's say 100 watts you can see that our voltage increases to accommodate the additional power demand. Example 4 shows that at 100w we need 4.47v.

Example 3

Example 4

### Which of these are NOT one of the four characteristics of Ohm's Law?

• Voltage
• Resistance
• Batteries
• Wattage (Power)

• Voltage
• Ohms
• Amperage
• Wattage

### Pick the option that make this following statement true: If you increase the voltage in a circuit . . . .

• the resistance will also increase.
• the amperage will also increase.
• the amperage will decrease.
• the wattage will decrease.

• < - - -

### Choose the incorrect statement.

• If your resistance is constant and you increase your wattage you will also increase your voltage.
• If your resistance is constant and you increase your wattage you will also increase your amperage.

• < - - -

• 0.25
• 0.14
• 0.20
• 0.17