Recreational Vehicle (RV) Technician Practice Test

To determine how many amps a 120V, 100W bulb will draw, we can use the relationship defined by Ohm’s Law, which states that Power (in watts) is equal to Voltage (in volts) multiplied by Current (in amperes). The formula can be rearranged to calculate current as follows: Current (I) = Power (P) / Voltage (V) In this case, we substitute the values: Power (P) = 100 watts Voltage (V) = 120 volts Using the formula: I = 100W / 120V Calculating this gives: I = 0.8333... amps, which can be simplified to approximately 0.83 amps. This calculation demonstrates that choosing 0.83 amps is accurate for a 120V, 100W bulb, confirming that this option is indeed the correct answer. Understanding this principle is fundamental for RV technicians, as they often need to calculate electrical loads for various RV components and ensure proper power distribution and safety within electrical systems.