Home
Class 12
PHYSICS
In a circuit, the current lags behind th...

In a circuit, the current lags behind the voltage by a phse difference of `pi//2`. The circuit contains which of the following?

A

Only R

B

Only C

C

Only L

D

R and C

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • Magnetic Effects of Current

    PUNJAB BOARD PREVIOUS YEAR PAPERS|Exercise EXCERSICE|47 Videos

  • Nuclear Reactions

    PUNJAB BOARD PREVIOUS YEAR PAPERS|Exercise Exercise|12 Videos

Similar Questions

Explore conceptually related problems

In an a.c. circuit, the current

In a series LCR circuit R = 200 Omega and the voltage and the frequency of the main supply is 220 V and 50 Hz respectively. On taking out the capacitance from the circuit the current lags behind the voltage by 30^@ . On taking out the inductor from the circuit the current leads the voltage by 30^@ . The power dissipated in the LCR circuit is

Show that in an inductane, the voltage leads the current by pi//2 .

Show mathematically that in an a.c. circuit containing only inductance, the current lags behind the e.m.f. by a phase of pi/2 . An a.c. voltage E=E_0 sin omegat is applied across an inductor L. Obtain an expression for current I.

The current in the given circuit is

In an a.c. circuit containing inductance

The reactance of an a.c. circuit is zero. Then, the circuit contains

When a circuit element X is conneted across a.c. sourceof emf 220sqrt2V , a current sqrt2 A flows through it and this current is in phase with applied voltage. When another element Y is connected across same a.c. source, the same current flows in the circuit, but it leads the voltages by pi//2. Find current that flows in the circuit when series combination of X and Y is connected acorss same a.c. voltage.

PUNJAB BOARD PREVIOUS YEAR PAPERS-MODEL PAPER 2021-MCQ
  1. If a coil of metal is kept stationary in a non-uniform magnetic field,...

    Text Solution

    |

  2. The induced emf in a coil is proportional to

    Text Solution

    |

  3. In a circuit, the current lags behind the voltage by a phse difference...

    Text Solution

    |

  4. A step-up transformer is used on a 120 V line to provide a potential d...

    Text Solution

    |

  5. For protecting a sensitive equipment form external magnetic field, it ...

    Text Solution

    |

  6. A charged particle enters at 30^(@) to the magnetic field. Its path be...

    Text Solution

    |

  7. The unit of electric field is not equivalent to

    Text Solution

    |

  8. If the surface charge density of charge be sigma electric field near ...

    Text Solution

    |

  9. Work done in moving a unit positive charge through a distance of x met...

    Text Solution

    |

  10. The electric field at a point at distance r from the center of electri...

    Text Solution

    |

  11. When a wire is stretched and its radius becomes (r )/(2) then its res...

    Text Solution

    |

  12. Kirchhoff’s rules I and II prove the law of

    Text Solution

    |

  13. A magnetic field can be produced by

    Text Solution

    |

  14. Is there a magnetic force exerted by a magnetic field on a stationary ...

    Text Solution

    |

  15. In a charged capacitor, the energy resides

    Text Solution

    |

  16. What is the angle between the electric dipole moment and the electric ...

    Text Solution

    |

  17. An electric dipole with dipole moment 4×10 ^−9 C m is aligned at 30^∘ ...

    Text Solution

    |

  18. The no. of electric lines of force radiating from a closed surface in ...

    Text Solution

    |

  19. The sensitivity of the potentiometer can be increased by

    Text Solution

    |

  20. A wire has a resistance of 10.5Omega at 21^(@)C and 16.4 Omega at 14...

    Text Solution

    |