Resistance: Resistance is the opposite of conductivity. It basically determines how many electrons are flowing through a conductor. The higher the charge difference and distance the higher the voltage.Ĭurrent: Current is the flow of electrons. Voltage: Voltage is the difference between the charge at two points in space. Everything strives towards having no charge at all. Excess of electrons means negative charge. These numbers aren't actually how many electrons pass through a wire at a given energy, because the numbers would have more than 20 zeroes to the right, that's why we have Volt and Ampere to measure these things.Ĭharge: Charge measures the imbalance between the amount of electrons and the amount of protons in a material. Power is how many electrons pass each second through a wire (current) times how much energy each electron carries (voltage). This energy is determined by the voltage. But those electrons can have a lot of energy, or very little energy. The definition of current is how many electrons are passing a wire every second. This current can be very small (low voltage, high resistance), or very high (high voltage, low resistance). Given a voltage, and a resistance, there will be some current. Something made out of gold and wide will have very low resistance, but a very thin aluminum wire will have high resistance (gold is a better conductor than aluminum, wider wire has less resistance) Resistance of a wire depends on the material the wire is made of, and how wide it is. You don't need to worry about what potential means. Voltage means that one point in the wire has less "potential" than another, so electricity flows.
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