Recreational Vehicle (RV) Technician Practice Test

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Using Watt's law, how is voltage calculated?

  1. Watts multiplied by amps

  2. Watts divided by amps

  3. Amps divided by watts

  4. Volts multiplied by watts

The correct answer is: Watts divided by amps

The calculation of voltage using Watt's law is based on the relationship defined by the equation: Power (Watts) = Voltage (Volts) multiplied by Current (Amps). Therefore, to isolate voltage, you rearrange the equation as follows: Voltage = Power divided by Current. When you take power in watts and divide it by the current in amps, you arrive at the voltage in volts. This principle is fundamental in electrical engineering, as it allows technicians to determine voltage levels in circuits when either power or current is known. Understanding this relationship is crucial for RV technicians, who often need to troubleshoot electrical systems and ensure they operate safely and effectively.

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