What is the power in a DC circuit defined as?

Power in a DC circuit is defined as the product of voltage and current. This relationship is derived from Ohm's Law, which states that voltage (V) is the product of current (I) and resistance (R). In a direct current (DC) circuit, power (P) can be calculated using the formula P = V × I.

This means that the amount of electrical power used by a device is directly related to how much voltage is applied and how much current flows in the circuit. Understanding this fundamental concept is crucial in the field of electronics, particularly for applications involving power management and circuit design.

Other options do not accurately define power in this context. While resistance and voltage or frequency may play roles in circuit behavior, they do not directly define power output as needed in a basic DC circuit analysis.