How is electric power calculated?

How is electric power calculated?

• A. Current times resistance
• B. Voltage times charge
• C. Voltage times current
• D. Energy divided by time

Answer: (C)

Electric power is calculated using the formula that relates voltage and current: power equals voltage times current. This relationship is derived from Ohm's law and the definition of power. In electrical circuits, power (measured in watts) represents the rate at which electrical energy is converted into another form of energy, such as heat, light, or mechanical energy. The formula \( P = VI \) (where \( P \) is power, \( V \) is voltage, and \( I \) is current) directly illustrates that the power in a circuit is determined by both the voltage across the circuit and the amount of current flowing through it. When the voltage is high and the current is also high, the resulting power is greater, indicating more energy is being used or transferred in a certain amount of time. This understanding is critical in designing and analyzing electrical systems, ensuring they operate efficiently and safely.

Electric power is calculated using the formula that relates voltage and current: power equals voltage times current. This relationship is derived from Ohm's law and the definition of power.

In electrical circuits, power (measured in watts) represents the rate at which electrical energy is converted into another form of energy, such as heat, light, or mechanical energy. The formula ( P = VI ) (where ( P ) is power, ( V ) is voltage, and ( I ) is current) directly illustrates that the power in a circuit is determined by both the voltage across the circuit and the amount of current flowing through it.

When the voltage is high and the current is also high, the resulting power is greater, indicating more energy is being used or transferred in a certain amount of time. This understanding is critical in designing and analyzing electrical systems, ensuring they operate efficiently and safely.