What is the formula for calculating power in an electrical circuit?

What is the formula for calculating power in an electrical circuit?

• A. Power (P) = Voltage (V) + Current (I)
• B. Power (P) = Voltage (V) / Current (I)
• C. Power (P) = Current (I) / Voltage (V)
• D. Power (P) = Voltage (V) x Current (I)

Answer: (D)

The formula for calculating power in an electrical circuit is power (P) equals voltage (V) multiplied by current (I). This relationship is derived from Ohm's Law, which states that voltage (V) equals current (I) times resistance (R). In simple terms, power quantifies the rate at which electrical energy is converted into another form of energy, such as heat or light, within the circuit. In practical terms, this means that if you know both the voltage supplied to a circuit and the current flowing through it, you can easily determine how much power the circuit is using. For example, if a circuit has a voltage of 10 volts and carries a current of 2 amperes, the power can be calculated as 10 volts multiplied by 2 amperes, resulting in 20 watts. This concept is essential for understanding how electrical devices function and for calculating the energy consumption of these devices, which is crucial for tasks such as electrical engineering, designing circuits, and managing energy efficiency.

The formula for calculating power in an electrical circuit is power (P) equals voltage (V) multiplied by current (I). This relationship is derived from Ohm's Law, which states that voltage (V) equals current (I) times resistance (R). In simple terms, power quantifies the rate at which electrical energy is converted into another form of energy, such as heat or light, within the circuit.

In practical terms, this means that if you know both the voltage supplied to a circuit and the current flowing through it, you can easily determine how much power the circuit is using. For example, if a circuit has a voltage of 10 volts and carries a current of 2 amperes, the power can be calculated as 10 volts multiplied by 2 amperes, resulting in 20 watts.

This concept is essential for understanding how electrical devices function and for calculating the energy consumption of these devices, which is crucial for tasks such as electrical engineering, designing circuits, and managing energy efficiency.