Electrical Hunts - Basic Electrical Knowledge
Electrical Voltage Electrical voltage is defined as electric potential difference between two points of an electric field. Using water pipe analogy, we can visualize the voltage as height difference that makes the water flow down. Voltage in series The total voltage of several voltage sources or voltage drops in series is their sum. Voltage in parallel Voltage sources or voltage drops in parallel have equal voltage. Voltage divider For electrical circuit with resistors (or other impedance) in series, the voltage drop V i on resistor R i is: Kirchhoff's voltage law (KVL) The sum of voltage drops at a current loop is zero. DC circuit Direct current (DC) is generated by a constant voltage source like a battery or DC voltage source. The voltage drop on a resistor can be calculated from the resistor's resistance and the resistor's current, using Ohm's law: Voltage calculation with Ohm's law V R = I R × R V R - voltage drop...