In an AC circuit, if the voltage is 120 V and the current is 10 A, what is the p

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Question: In an AC circuit, if the voltage is 120 V and the current is 10 A, what is the power factor if the real power is 600 W? (2021)

Options:

Correct Answer: 0.8

Exam Year: 2021

Solution:

Power factor = Real Power / (Voltage × Current) = 600 / (120 × 10) = 0.5.

In an AC circuit, if the voltage is 120 V and the current is 10 A, what is the power factor if the real power is 600 W? (2021)

In an AC circuit, if the voltage is 120 V and the current is 10 A, what is the power factor if the real power is 600 W? (2021)

Step 1: Identify the given values. We have a voltage of 120 V, a current of 10 A, and a real power of 600 W.
Step 2: Understand the formula for power factor. The power factor is calculated using the formula: Power factor = Real Power / (Voltage × Current).
Step 3: Calculate the product of Voltage and Current. Multiply 120 V by 10 A to get 1200 VA (volt-amperes).
Step 4: Use the formula to find the power factor. Substitute the values into the formula: Power factor = 600 W / 1200 VA.
Step 5: Perform the division. Calculate 600 divided by 1200, which equals 0.5.
Step 6: State the final answer. The power factor is 0.5.

Power Factor – The ratio of real power (in watts) to apparent power (in volt-amperes) in an AC circuit, indicating the efficiency of power usage.
Real Power – The actual power consumed by the circuit, measured in watts (W).
Apparent Power – The product of the voltage and current in an AC circuit, measured in volt-amperes (VA).