Home
Class 12
PHYSICS
What is the power factor of a circuit ha...

What is the power factor of a circuit having a pure resistance only?

Text Solution

Verified by Experts

It is the ratio of true power to the apparent power
` cos delta = (P_(av))/(epsilon_(rms)i_(rms))`
for a purely resistive circuit `delta` = 0, Hence, power factor is unity.
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    MODERN PUBLICATION|Exercise Revision Exercises ( Additional Questions )|10 Videos

  • ALTERNATING CURRENT

    MODERN PUBLICATION|Exercise Revision Exercises (Fill in the Blanks )|10 Videos

  • ALTERNATING CURRENT

    MODERN PUBLICATION|Exercise HIGHER ORDER THINKING SKILLS & ADVANCED LEVEL|7 Videos

  • ATOMS

    MODERN PUBLICATION|Exercise Chapter Practice Test|16 Videos

Similar Questions

Explore conceptually related problems

The power factor of a circuit is

The power factor of L-R circuit is-

What is the power factor for the circuit shown ?

Power factor of the circuit is –

The power factor of the circuit shown in figure is

The power factor of the circuit shown in the figure is

The power factor of the circuit as shown in figure is

Find the power factor of the circuit shown in figure.

Find the power factor of the circuit shown in figure.

The power factor of an AC circuit having resistance (R) and inductance (L) connected in series and an angular velocity omega is

MODERN PUBLICATION-ALTERNATING CURRENT -Revision Exercises ( Very short Annwer Qustion )
  1. What do you mean by power in an Ac circuit ?

    Text Solution

    |

  2. Give the expression for average power dissipated in a resistor over a ...

    Text Solution

    |

  3. What is the power factor of a circuit having a pure resistance only?

    Text Solution

    |

  4. What is the power factor of an A circuit containing inductor or capac...

    Text Solution

    |

  5. The power factor of an AC circuit is 0.5 . What will be the phase diff...

    Text Solution

    |

  6. Define the term 'wattles current'.

    Text Solution

    |

  7. What is the idle component or wattless component of AC ?

    Text Solution

    |

  8. Why inductors or capacitors are used in AC circuits for controlling cu...

    Text Solution

    |

  9. What are undamped and damped oscillations ?

    Text Solution

    |

  10. What are undamped and damped oscillations ?

    Text Solution

    |

  11. What is the dimensional formula of sqrt(LC) ?

    Text Solution

    |

  12. What is the natural frequency of LC circuit ? What is the reactance of...

    Text Solution

    |

  13. What is the energy stored in a pure LC circuit ?

    Text Solution

    |

  14. Why connot we use a.c. for electrolysis?

    Text Solution

    |

  15. sqrt(k//m) has dimennsions of which physical quantity?

    Text Solution

    |

  16. What is a transformer ? On what principle the transformer is based ?

    Text Solution

    |

  17. What is a step up transformer?

    Text Solution

    |

  18. What is a step down transformer?

    Text Solution

    |

  19. What is transformation ratio ?

    Text Solution

    |

  20. What happens to the AC current in a transformer if alternating voltage...

    Text Solution

    |