Home
Class 12
PHYSICS
The value of capacitive reactance of cap...

The value of capacitive reactance of capacitor `X_C`. If the values of capacitance and frequency becomes double, the value of capacitive reactance becomes ………

A

`4X_C`

B

`X_C/2`

C

`X_C/4`

D

`2X_C`

Text Solution

Verified by Experts

The correct Answer is:
C

`X_C=1/(2pifC) " " therefore X._C=1/(2pi(2f)(2C))`
`therefore X._C=1/(4(2pifC))=X_C/4`
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENTS

    KUMAR PRAKASHAN|Exercise SECTION-D MCQs (DARPAN BASED ON TEXTBOOK)|188 Videos
  • ATOMS

    KUMAR PRAKASHAN|Exercise Section-D -MCQs asked in GUJCET / Board Exam|34 Videos

Similar Questions

Explore conceptually related problems

The value of capacitive reactance is given by ……

Write the SI unit of capacitive reactance.

Capacitive reactance of a capacitor for a D.C. circuit is.......

What value of temperature in farenheit scale becomes double than value in celcius scale ?

What is capacitive reactance? Write its unit.

A pure capacitor of capacitive reactance of 10 Omega is connected to an A.C. source. If the frequency of a source is doubled, the capacitive reactance will be ....... Omega .

A 15.0 mu F capacitor is connected to a 220 V , 50 z source. Find the capacitive reactance and the current ( rms and peak ) in the circuit. If the frequency is doubled, what happens to the capacitive reactance and the current ?

A 15.0 muF capacitor is connected to a 220 V, 50 Hz source. Find the capacitive reactance and the current (rms and peak) in the circuit. If the frequency is doubled, what happens to the capacitive reactance and the current?

A 10muF capacitor is connected to a 230 V, 50 Hz source. Find the capacitive reactance and the current (rms and peak ) in the circuit. If the frequeny is doubled , what happens to the capacitive reactance and the current ?

The reactance of a capacitor of 1/pi in are A.C. circuit having frequency of 50Hz is .....

KUMAR PRAKASHAN-ALTERNATING CURRENTS -SECTION-D MCQs (COMPETITIVE EXAMS)
  1. In a step-down transformer ....... increases.

    Text Solution

    |

  2. The phase difference between current and voltage for L-C-R A.C. series...

    Text Solution

    |

  3. The value of capacitive reactance of capacitor XC. If the values of ca...

    Text Solution

    |

  4. When a wire loop is rotated in a magnetic field the direction of induc...

    Text Solution

    |

  5. In L-C-R circuit, the energy dissipated in …….

    Text Solution

    |

  6. The voltage of an A.C. source varies with time according to the equati...

    Text Solution

    |

  7. A L-C-R circuit connected to an A.C. source of frequency f. If current...

    Text Solution

    |

  8. A series R-C circuit is connected to an alternating voltage source. Co...

    Text Solution

    |

  9. Which of the following combinations should be selected for better tuni...

    Text Solution

    |

  10. The potential differences across the resistance, capacitance and induc...

    Text Solution

    |

  11. A small signal voltage V(t) = V0 sinomegat is applied across an ideal...

    Text Solution

    |

  12. An inductor 20 mH, a capacitor 50 muF and a resistor 40Omega are conne...

    Text Solution

    |

  13. An inductor 20 mH, a capacitor 100 muF and a resistor 50 Omega are con...

    Text Solution

    |

  14. For the reading obtained in ideal voltmeters and ammeters in above cir...

    Text Solution

    |

  15. An alternating voltage V = V0 sinomegat is applied across a circuit. A...

    Text Solution

    |

  16. In an A.C. circuit the ratio of inductive reactance and capacitive rea...

    Text Solution

    |

  17. A transformer has an efficiency of 80%. It works at 100 V and 4kW. If ...

    Text Solution

    |

  18. In an A.C. circuit, a resistor of ROmega is connected in series with a...

    Text Solution

    |

  19. At time t = 0 s, voltage of an A.C. generator starts from 0 V and beco...

    Text Solution

    |

  20. In a series resonant circuit, the A.C. voltages across resistance R, i...

    Text Solution

    |