Home
Class 12
PHYSICS
The phase angle between the current and ...

The phase angle between the current and voltage in an L-R circuit is `30^(@)`. What is the impendance of the circuit if the resistance in the circuit is `10sqrt(3) Omega`?

A

`10 Omega`

B

`15 Omega`

C

`20 Omega`

D

`30 Omega`

Text Solution

Verified by Experts

The correct Answer is:
C
Power factor = `cos theta = cos 30^(@) = (sqrt3)/2`
Power factor = `R/Z`
`:. Z = R/(cos phi) = (10sqrt(3))/(sqrt(3)//2)= 20 Omega`.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENTS

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP - 16|30 Videos

  • ELASTICITY

    MARVEL PUBLICATION|Exercise Test Your Grasp - 5|15 Videos

  • ELECTRONS AND PHOTONS

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP - 17|15 Videos

Similar Questions

Explore conceptually related problems

The phase angle between current and voltage in a purely inductive circuit is

The phase difference between the current and voltage of LCR circuit in series combination at resonance is

The phase difference between voltage and current in series L-C circuit is

The phase difference between voltage and current in an LCR series circuit is

The phase relationship between current and voltage in a pure resistive circuit is best represented by

Phase difference between voltage and current in a capacitor in an ac circuit is

If the phase difference between voltage and current is pi//6 and the resistance in the circuit is sqrt(300) Omega , then the impedance of the circuit will be

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 electrical circuit R,L,C and an AC voltage source are all connected in series. When L is removed from the circuit, the phase difference between the voltage and the current in the circuit is pi//3 . If instead, C is removed from the circuit, difference the phase difference is again pi//3 . The factor of the circuit is

MARVEL PUBLICATION-ELECTROMAGNETIC INDUCTION AND ALTERNATING CURRENTS -TEST YOUR GRASP - 16
  1. The phase angle between the current and voltage in an L-R circuit is 3...

    Text Solution

    |

  2. A coil having an area of 2m^(2) is placed in a magnetic field which ch...

    Text Solution

    |

  3. A straight conductor of length 2 is moves a velocity of 2 m//s, in a m...

    Text Solution

    |

  4. The magnetic flux passing perpendicular to the plane of a coil given b...

    Text Solution

    |

  5. Two identical circular loops of metal wire are lying on a table withou...

    Text Solution

    |

  6. A telegraph wire of length 2500m, is kept in E-W direction, at a heigh...

    Text Solution

    |

  7. When the current in a coil changes from 2A to 4A in 0.05 sec, the e.m....

    Text Solution

    |

  8. Two coil A and B are placed in a circuit. When current changes by 8 Am...

    Text Solution

    |

  9. Two coils P and S have a mutual inductance of 5 xx 10^(-3)H. If the cu...

    Text Solution

    |

  10. The primary and secondary voltage of an ideal step down transformer ar...

    Text Solution

    |

  11. A step down transformer has a turn ratio of 20 : 1. If 8 volt are deve...

    Text Solution

    |

  12. A step down transformer of efficiency 80% is used on a 1000V line to d...

    Text Solution

    |

  13. A coil 10 turns and area 10^(-2)m^(2) rotates in a magnetic field of 0...

    Text Solution

    |

  14. An alternating e.m.f. is given by E=10 cos omega t. If the frequency i...

    Text Solution

    |

  15. In an A.C. Circuit, the current is given by I=6 sin(200 pi t+(pi)/6)...

    Text Solution

    |

  16. An alternating e.m.f. given by e=200 sin 50 t is applied to a circuit ...

    Text Solution

    |

  17. An alternating voltage is represented by V=80 sin(100 pi t)cos(100 p...

    Text Solution

    |

  18. In an A.C. circuit, E=100 sin (500 t) volt and I=1000 sin(500 t +(pi)/...

    Text Solution

    |

  19. In an A.C. circuit, a resistance R=40 Omega and an inductance L are c...

    Text Solution

    |

  20. The inductance of a coil is 10 H. What is the ratio of its reactance w...

    Text Solution

    |

  21. For tuning radio and T.V. circuits, series resonance circuits are used...

    Text Solution

    |