Electricity is a form of energy that is created by the movement of electrons. It can be found in nature, such as lightning, or generated artificially to power our homes and devices.
The basic units of electricity are voltage, current, and resistance. Voltage is measured in volts (V), current is measured in amps (A), and resistance is measured in ohms (Ω).
Electricity flows through a circuit in a closed loop. It starts at the power source, flows through the wires, and then back to the power source. The flow of electricity is controlled by components such as switches and resistors.
AC (alternating current) electricity changes direction periodically, while DC (direct current) electricity flows in one direction. AC is used for long-distance transmission of electricity, while DC is used for smaller electronic devices.
Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points. This means that if the voltage increases, the current will also increase, and if the voltage decreases, the current will decrease.