What is consumed when a voltage is applied to a circuit and current flows through the load?

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

Answer: (B)

When a voltage is applied to a circuit and current begins to flow through the load, power is consumed in the form of electrical energy. Power, measured in watts, is the rate at which energy is used or transferred in a circuit. This relationship is described by the equation ( P = V \times I ), where ( P ) is power, ( V ) is voltage, and ( I ) is current.

As the current flows through the load, energy is converted into other forms, such as heat or light, depending on the nature of the load (like a resistor or a light bulb). This consumption of power is essential in electrical systems, as it reflects how much work the circuit is accomplishing.

Voltage itself is not consumed; rather, it is the driving force that causes current to flow. Current refers to the flow of electric charge but does not quantify energy usage directly, and resistance relates to how much the flow of current is impeded in a circuit. Therefore, power is the term that accurately describes what is being consumed in this scenario.