Home
Class 12
PHYSICS
Reactance of a capacitor of capacitance ...

Reactance of a capacitor of capacitance `CmuF` for ac frequency `400/pi Hz` is `25 Omega` . The value C is

A

`50muF`

B

`25muF`

C

`100muF`

D

`75muF`

Text Solution

Verified by Experts

The correct Answer is:
A
`X_(C)=(1)/(2pifC)`
`therefore C=(1)/(2pifX_(C))=(1)/(2pixx(400)/(pi)xx25)=50muF`
Promotional Banner

Topper's Solved these Questions

  • ELASTICITY

    NIKITA PUBLICATION|Exercise MCQ|314 Videos

  • ELECTRONS AND PHOTONS

    NIKITA PUBLICATION|Exercise MCQs|162 Videos

Similar Questions

Explore conceptually related problems

The reactance of a capacitor of capcitance C muF for an a.c. of frequency 400/(pi) Hz is 25 Omega . What is the value of C?

Reactance of a capacitor of capacitance 1//pi farad at 50 Hz is

The reactance of a 25 muF capacitor at the AC frequency of 4000Hz is

The reactance offered by a capcitor to an a.c. of frequency 50 Hz is 15 Omega . What would be its reactance if the frequency is increased to 75 Hz?

The reactance of a capacitor of capacitance C is X. If both th frequency and capacitance be doubled, then new reactance will be

Reactance of an inductor of 1/(pi) henry at 50Hz frequency is

Find the reactance of a capacitor having a capacitance ((1)/(pi))mu F at 50 Hz .

The reactance of 1muF condenser in an ac circuit of frequency 50 Hz is nearly

NIKITA PUBLICATION-ELECTROMAGNETIC INDUCTION-MCQs
  1. Which graph gives the correct relation between Z and f for the given R...

    Text Solution

    |

  2. In the given L-R circuit, which of the following gives correct relatio...

    Text Solution

    |

  3. Reactance of a capacitor of capacitance CmuF for ac frequency 400/pi H...

    Text Solution

    |

  4. In a coil, L=5H, current changes at the rate of 2 ampere per second. ...

    Text Solution

    |

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

    Text Solution

    |

  6. Flux passes through coil changes from 2xx10^(-3)Wb to 3xx10^(-3) Wb du...

    Text Solution

    |

  7. A conductor of length 10 cm is moved parallel to itself with a speed o...

    Text Solution

    |

  8. In an AC circuit containing only capacitance the current

    Text Solution

    |

  9. Wattless current is obtained

    Text Solution

    |

  10. For a coil of unit area, induction B is doubled in 0.2s. Then, the ind...

    Text Solution

    |

  11. Deal beat galvanometer works on the principle of

    Text Solution

    |

  12. The capacitive reactance is 20Omega, when the frequency is 100 Hz. Fin...

    Text Solution

    |

  13. In a series resonant L-C-R circuit, the power factor is

    Text Solution

    |

  14. A half metre rod is rotating abou tone fixed end perpendicular to unif...

    Text Solution

    |

  15. In an RLC circuit, capacitance is changed from C to 2C. For the resona...

    Text Solution

    |

  16. When a rod of length l is rotated with angular velocity of omega in a ...

    Text Solution

    |

  17. Resistance of earth coil is 7Omega. If flux associated with coil chang...

    Text Solution

    |

  18. In the induction coil, across secondary coil the output voltage is pra...

    Text Solution

    |

  19. A wire of length 2.5 km and resistance 35 Omega has fallen from a heig...

    Text Solution

    |

  20. The average value dissipated by resistance is (I(0)=peak value of curr...

    Text Solution

    |