Final answer:
The formula for calculating power in a DC circuit with known current and voltage is P = IV, where 'P' is power, 'I' is current, and 'V' is voltage. Power is measured in watts, which is the product of amps (A) times volts (V). The correct option is d.
Step-by-step explanation:
The formula for finding power in a DC circuit when current and voltage are known is P = IV. This equation indicates that the power (P) consumed by a circuit is the product of the voltage (V) across the circuit and the current (I) flowing through it. Using Ohm's law (V = IR), we can derive other formulas for power, such as P = I²R when we are given the current and the resistance, and P = V²/R when voltage and resistance are known. As an example, if a circuit has a rated voltage of 12 V and a current of 0.12 A, the power consumed by the circuit would be calculated as follows: P = IV = (0.12 A)(12 V) = 1.44 W.
The correct formula for finding power in a DC circuit when current and voltage are known is P = IV. This equation gives the electric power consumed by a circuit with a voltage drop of V and a current of I. For example, if you have a circuit with a current of 5A and a voltage of 10V, you can calculate the power by multiplying the current and voltage: 5A x 10V = 50W. This means that the circuit is consuming 50 watts of power. Remember that power is the product of current and voltage.