The rate at which energy is consumed in a circuit is called what?

The rate at which energy is consumed in a circuit is called what?

• A. Current
• B. Voltage
• C. Resistance
• D. Electrical Power

Answer: (D)

The rate energy is consumed in a circuit is electrical power. Power tells you how fast energy is used, measured in watts (one watt equals one joule per second). In circuits, power is found from P = V × I, so it equals the voltage times the current. It can also be written as P = I^2R or P = V^2/R, depending on which quantities you know. The other terms describe different ideas: current is the flow of electric charges (amperes), voltage is the driving potential difference (volts), and resistance is the opposition to current (ohms). So the rate of energy use is power, not current, voltage, or resistance.

The rate energy is consumed in a circuit is electrical power. Power tells you how fast energy is used, measured in watts (one watt equals one joule per second). In circuits, power is found from P = V × I, so it equals the voltage times the current. It can also be written as P = I^2R or P = V^2/R, depending on which quantities you know. The other terms describe different ideas: current is the flow of electric charges (amperes), voltage is the driving potential difference (volts), and resistance is the opposition to current (ohms). So the rate of energy use is power, not current, voltage, or resistance.