National League for Nursing (NLN) Science Practice Exam

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A 110-volt appliance draws 2.0 amperes. How many watts of power does it require?

220 watts
55 watts
112 watts
108 watts

The correct answer is: 220 watts

To determine the power consumption of an appliance in watts, the formula used is Power (P) = Voltage (V) × Current (I). In this scenario, the appliance has a voltage of 110 volts and a current of 2.0 amperes. When you multiply these two values together: Power (P) = 110 volts × 2.0 amperes = 220 watts. This calculation accurately reflects the amount of electrical power the appliance requires to operate. Therefore, the correct answer indicates that the appliance requires 220 watts. Understanding this formula is crucial for various applications in both electrical engineering and practical home appliance usage, as it allows individuals to estimate power consumption and ensure that circuits can handle the load.