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In an AC circuit, if the voltage is 120 V and the current is 10 A with a power f

Practice Questions

Q1
In an AC circuit, if the voltage is 120 V and the current is 10 A with a power factor of 0.8, what is the real power consumed? (2021)
  1. 960 W
  2. 1200 W
  3. 800 W
  4. 1000 W

Questions & Step-by-Step Solutions

In an AC circuit, if the voltage is 120 V and the current is 10 A with a power factor of 0.8, what is the real power consumed? (2021)
  • Step 1: Identify the voltage (V) in the circuit, which is given as 120 V.
  • Step 2: Identify the current (I) in the circuit, which is given as 10 A.
  • Step 3: Identify the power factor, which is given as 0.8.
  • Step 4: Use the formula for real power (P), which is P = V * I * power factor.
  • Step 5: Substitute the values into the formula: P = 120 V * 10 A * 0.8.
  • Step 6: Calculate the multiplication: 120 * 10 = 1200.
  • Step 7: Now multiply 1200 by the power factor: 1200 * 0.8 = 960.
  • Step 8: The real power consumed is 960 W.
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