Home
Class 12
PHYSICS
For wattless power is an AC circuit, the...

For wattless power is an `AC` circuit, the phase angle between the current and voltagge is

A

`90^(@)`

B

`45^(@)`

C

`180^(@)`

D

`60^(@)`

Text Solution

Verified by Experts

The correct Answer is:
A

If the current is wattless then power is zero. Hence phase difference `varphi~~90^(@)`
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    A2Z|Exercise Problems Based On Mixed Concepts|40 Videos
  • ALTERNATING CURRENT

    A2Z|Exercise Section B - Assertion Reasoning|26 Videos
  • ALTERNATING CURRENT

    A2Z|Exercise Different Ac Circuits|30 Videos
  • ATOMIC PHYSICS

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

A 0.21 H inductor and a 12 ohm resistance are connected in series to a 220 V . 50 Hz ac source. Calculate the current in the circuit and the phase angle between the current and the source voltage.

A 9//100 (pi) inductor and a 12 Omega resistanace are connected in series to a 225 V, 50 Hz ac source. Calculate the current in the circuit and the phase angle between the current and the source voltage.

In series LCR circuit, the phase angle between supply voltage and current is

A 0.21-H inductor and a 88-Omega resistor are connected in series to a 220-V, 50-Hz AC source. The current in the circuit and the phase angle between the current and the source voltage are respectively. (Use pi= 22//7)

A seriesLCR circuit is connected to an ac voltage source. When L is removed from the circuit, the phase difference between current and voltage is pi/3 . If instead C is removed from the circuit phase difference is agin pi/3 between current and voltage. Power factor of circuit is:

A series RL circuit is connected to an AC power supply of 120 V . The frequency of source is 50 Hz. Calculate the phase difference between the current and voltage in the circuit if values of R and L are 10 Omega and 0.01 H, respectively. Also find the current in the circuit .

In an AC circuit X_(C)=X_(L) . The phase differe3nce between the current and voltage will be

A lamp consumes only 50% of peak power in an a.c. circuit. What is the phase difference between the applied voltage and the circuit current

An a.c. circuit contains a resistance of 3 Omega and inductive reactance of 4Omega . The cosine of the phase angle between the current and potential difference in this circuit is

A2Z-ALTERNATING CURRENT-Power In Ac Circuits
  1. Current in the circuit is wattless, if

    Text Solution

    |

  2. In an AC circuit, V and I are given by V=100sin(100t)"volts", I=100sin...

    Text Solution

    |

  3. A sinusoidal alternating current of peak value (I0) passes through a h...

    Text Solution

    |

  4. In an a.c. Circuit the voltage applied is E=E(0) sin (omega)t. The res...

    Text Solution

    |

  5. In an AC circuit, the instantaneous values of e.m.f and current are e...

    Text Solution

    |

  6. In an AC circuit, the current is given by i=5sin(100t-(pi)/2) and the ...

    Text Solution

    |

  7. What is the r.m.s. value of an alternating current which when passed t...

    Text Solution

    |

  8. In an AC circuit with voltage V and current I, the power dissipated is

    Text Solution

    |

  9. For an AC circuit V=15sin omegat and I=20cos omegat the average power ...

    Text Solution

    |

  10. An alternating e.m.f. of angular frequency omega is applied across an ...

    Text Solution

    |

  11. The power factor of a good choke coil is

    Text Solution

    |

  12. For wattless power is an AC circuit, the phase angle between the curre...

    Text Solution

    |

  13. The r.m.s current in an AC circuit is 2A. If the wattless current be s...

    Text Solution

    |

  14. In an LR-circuit, the inductive reactance is equal to the resistance R...

    Text Solution

    |

  15. An L-C-R series circuit with 100Omega resistance is connected to an AC...

    Text Solution

    |

  16. An rms voltage of 110 V is applied across a series circuit having a re...

    Text Solution

    |

  17. 2.5/(pi) muF capacitor and 3000-ohm resistance are joined in series t...

    Text Solution

    |

  18. The self-inductance of a choke coil is 10mH. When it is connected with...

    Text Solution

    |

  19. A group of electric lamps having a total power rating of 1000 watt is ...

    Text Solution

    |

  20. In the circuit of fig, the source frequency is omega=2000 rad s^(-1). ...

    Text Solution

    |