Which formula is used to calculate power (P) in a DC circuit?

Which formula is used to calculate power (P) in a DC circuit?

• A. P = I + E
• B. P = R / I
• C. P = I x E
• D. P = E / R

Answer: (C)

The formula used to calculate power (P) in a direct current (DC) circuit is expressed as P = I x E. In this formula, P stands for power measured in watts, I is the current measured in amperes (A), and E is the voltage measured in volts (V). This relationship showcases that power is directly proportional to the product of current and voltage in a circuit. This formula is fundamental in electrical engineering and electronics because it provides a clear and direct way to determine how much power is being consumed or produced based on the current flowing through the circuit and the voltage supplied. Understanding this relationship is crucial for designing electrical systems and ensuring components are rated correctly for power handling. The other formulas mentioned do not accurately represent the relationship between power, current, and voltage in a DC circuit, which is why they are not appropriate choices.

The formula used to calculate power (P) in a direct current (DC) circuit is expressed as P = I x E. In this formula, P stands for power measured in watts, I is the current measured in amperes (A), and E is the voltage measured in volts (V). This relationship showcases that power is directly proportional to the product of current and voltage in a circuit.

This formula is fundamental in electrical engineering and electronics because it provides a clear and direct way to determine how much power is being consumed or produced based on the current flowing through the circuit and the voltage supplied. Understanding this relationship is crucial for designing electrical systems and ensuring components are rated correctly for power handling.

The other formulas mentioned do not accurately represent the relationship between power, current, and voltage in a DC circuit, which is why they are not appropriate choices.