Ohms Law

Ohms Law

"ohms law describes the relationship between volts, ohms, and amps."

Ohms law is a very simple.  We can see in this chart the relationship between each volts, ohms, and amps. We can see how the numbers of one can affect the others.

[diagram]

In simple words, these electrical terms can be described as:

Volts - The potential difference between positive atoms and negative atoms.  The bigger the difference the higher the power of the voltage.  Negative atoms are attracted to positive atoms.

Resistance - Self explanatory.  A material or device that 'resists' electric current.  The higher the resistance, the less current can flow through.  Resistors are generally light bulbs, speakers, etc.

Amps/Amperage/Amperes - The current flow of the voltage.  The amperes can be dependent upon the voltage and the resistance. (V/R)

Series Circuits

[diagram]

Basic principals of series circuits:

Current (amps) is the same everywhere in the circuit. (Kirchoff's Law)

Rt (total resistance) is the SUM of each resistive unit.

Voltage drop across each resistor when added up will equal the applied voltage (voltage of the power supplied) or, voltage gets used up pushing through the circuit, and the part that has more resistance will use up more voltage. (eg. lightbulb with higher resistance will glow brighter)

If each resistor has a different resistance, then the voltage drop between (before and after) each resistor will be different. (higher resistors use higher voltage)

Parallel Circuits

[diagram]

'At' (total amperage) equals the SUM of all Current branches. (Add all amps together)

Rt = R1x R2/R1+R2

Applied Voltage is the same at all branches.

Watts / Power

[diagram]

Watts is the amount of 'Power' in a circuit.

Watts needs both volts and amps.