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

Practice Questions

Q1
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)
  1. 0.5
  2. 0.6
  3. 0.8
  4. 1.0

Questions & Step-by-Step Solutions

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.
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