What is the formula for calculating wattage if voltage and current are known?

What is the formula for calculating wattage if voltage and current are known?

• A. Add voltage and current
• B. Multiply voltage by current
• C. Divide voltage by current
• D. Subtract current from voltage

Answer: (B)

The formula for calculating wattage, when voltage and current are known, is to multiply voltage by current. This relationship is defined by Ohm's Law, which states that power (measured in watts) is equal to the product of voltage (measured in volts) and current (measured in amperes). The equation can be expressed as: Power (P) = Voltage (V) × Current (I) Understanding this principle is essential for anyone working in electrical fields, including commercial food equipment service, as it allows technicians to determine the power requirements of devices, troubleshoot electrical issues, and ensure that equipment operates safely and efficiently. In practice, knowing how to calculate wattage can help in assessing the electrical load on circuits, selecting appropriate overcurrent protection devices, and ensuring that wiring is adequate for the equipment being powered.

The formula for calculating wattage, when voltage and current are known, is to multiply voltage by current. This relationship is defined by Ohm's Law, which states that power (measured in watts) is equal to the product of voltage (measured in volts) and current (measured in amperes). The equation can be expressed as:

Power (P) = Voltage (V) × Current (I)

Understanding this principle is essential for anyone working in electrical fields, including commercial food equipment service, as it allows technicians to determine the power requirements of devices, troubleshoot electrical issues, and ensure that equipment operates safely and efficiently.

In practice, knowing how to calculate wattage can help in assessing the electrical load on circuits, selecting appropriate overcurrent protection devices, and ensuring that wiring is adequate for the equipment being powered.