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Power Factor

Add a capacitor or a choke. Predict what the wattmeter reads.

Physics · Class 12 · Power and power factor · 8 simulations. For JEE, NEET and your boards.

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What you'll learn

  1. Watts from a phase gap: P = Vrms Irms cos φ
  2. Power factor 0.8: Power factor = R/Z
  3. Power factor one: Cancel the coil with a capacitor
  4. The current leads: Where does the extra capacitor go?
  5. A coil's heat: Only R makes heat
  6. Lamp and capacitor: Voltages add as arrows
  7. The choke: A choke drops volts without heat
  8. A resistor instead: A resistor wastes the extra volts