Electrical power is the rate at which electrical energy is transferred or used. Think of it like water flowing through a pipe. The wider the pipe (higher voltage) and the faster the water flows (higher current), the more water (electrical energy) gets delivered per second.
Rate of energy transfer: It's not just about the amount of electrical energy, but how quickly that energy is used.
Measured in watts (W): This is the standard power unit, similar to how we measure speed in kilometers per hour (kmph). One watt is equal to one joule of energy per second.
Dependant on voltage and current: The formula for electrical power is P = VI, where P is power, V is voltage (measured in volts), and I is current (measured in amperes). So, you can have high energy with a combination of high voltage and high current, or low voltage and low current.
P = I²R (Power = Current squared x Resistance) This formula is useful when you know the current and resistance of a circuit but not the voltage directly.
P = V²/R (Power = Voltage squared divided by Resistance) This formula is helpful when you know the voltage and resistance but not the current directly.