Ohm's law & Resistor Color Code Calculator
An electric circuit is formed when a conductive path is created to allow electric charge to continuously move. This continuous movement of electric charge through the conductors of a circuit is called a current, and it is often referred to in terms of “flow,” just like the flow of a liquid through a hollow pipe
Voltage is a specific
measure of potential energy that is always relative between two points. When we
speak of a certain amount of voltage being present in a circuit, we are
referring to the measurement of how much potential energy exists to
move charge carriers from one particular point in that circuit to another
particular point. Without reference to two particular points, the
term “voltage” has no meaning.
Current tends to move
through the conductors with some degree of friction, or opposition to motion.
This opposition to motion is more properly called resistance. The amount of
current in a circuit depends on the amount of voltage and the amount of resistance
in the circuit to oppose current flow. Just like voltage, resistance is a
quantity relative between two points. For this reason, the quantities of
voltage and resistance are often stated as being “between” or “across” two
points in a circuit
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