Final answer:
The statement is true; electric power (P) is calculated as the product of current (I) in amperes and voltage (V) in volts, expressed as P = IV. This is a fundamental concept in electrical physics, distinctly different from Ohm's Law which involves resistance.
Step-by-step explanation:
The statement that Watt's law states that the power in watts is equal to the product of voltage in volts and current in amperes is true. Electric power, denoted as P, is indeed the product of current (I) and voltage (V), which is expressed as P = IV. This relationship is fundamental in electrical engineering and physics. For example, a car's auxiliary power outlet rated at 20 A and 12 V can deliver a maximum power of 240 W, as power is calculated by multiplying current by voltage.
It's important to note that this is not the same as Ohm's Law, which relates voltage, current, and resistance in a circuit, stating that the voltage across a resistor equals the current through the resistor multiplied by the resistance (V = IR). On the other hand, the expression for electric power takes into account the current flowing through a circuit and the voltage across it without directly involving resistance unless combined with Ohm's Law in different forms, such as P = V²/R or P = I²R, to gain different insights into power consumption depending on known variables.