I prefer to state Power dissipated = R*I2. This is correct both for DC and AC.polekitten said:Why does electrical power = voltage x current?
er, uh, make that "voltage is a difference in potential"polekitten said:voltage is a difference in charge between 2 points.
Power is the rate at which energy is transferred or converted. It is measured in watts (W). Current is the flow of electric charge, usually carried by electrons. It is measured in amperes (A). Voltage is the difference in electric potential between two points in an electrical circuit. It is measured in volts (V).
The relationship between power, current, and voltage can be described by Ohm's Law, which states that the current flowing through a conductor is directly proportional to the voltage applied and inversely proportional to the resistance of the conductor. This can be expressed as P=IV, where P is power, I is current, and V is voltage.
Power is measured in watts (W), current is measured in amperes (A), and voltage is measured in volts (V).
The power, current, and voltage can affect the performance of an electrical device in several ways. For example, a higher voltage can increase the speed of an electric motor, while a higher current can cause a heating effect in the device, which can affect its efficiency and lifespan. It is important to properly match the power, current, and voltage requirements of a device to ensure optimal performance and safety.
Power, current, and voltage can be found in many aspects of everyday life. Some common sources include batteries, power outlets, and solar panels. In addition, power, current, and voltage are also present in electronic devices such as smartphones, computers, and household appliances.