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The power factor of an AC circuit is defined as the ratio of:

Practice Questions

Q1
The power factor of an AC circuit is defined as the ratio of:
  1. Real power to apparent power
  2. Apparent power to real power
  3. Voltage to current
  4. Current to voltage

Questions & Step-by-Step Solutions

The power factor of an AC circuit is defined as the ratio of:
  • Step 1: Understand that in an AC circuit, power can be divided into two types: real power and apparent power.
  • Step 2: Real power is the actual power that does useful work in the circuit, measured in watts (W).
  • Step 3: Apparent power is the total power flowing in the circuit, measured in volt-amperes (VA).
  • Step 4: The power factor is a way to express how effectively the electrical power is being used.
  • Step 5: The power factor is calculated by taking the ratio of real power (W) to apparent power (VA).
  • Step 6: This ratio can be expressed as: Power Factor = Real Power / Apparent Power.
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