Home
Class 12
PHYSICS
A fully charged capacitor has a capacita...

A fully charged capacitor has a capacitance 'C'. It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity 's' and mass 'm'. If the temperature of the block is raised by 'DeltaT', the potential difference 'V' across the capacitance is

A

`sqrt((2mCDeltaT)/(s))`

B

`(mCDeltaT)/(s)`

C

`(msDeltaT)/(C)`

D

`sqrt((2msDeltaT)/(C))`

Text Solution

Verified by Experts

The correct Answer is:
D

Heat `=(1)/(2)CV^(2)=ms DeltaT`
`V=sqrt((2mSDeltaT)/(C ))`
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

A capacitor of capacitance C is fully charged by a 200 V battery. It is then discharged through a small coil of resistnace wire embedded in a thermally insulated block of specific heat 2.5xx10^(2)Jkg^(-1)K^(-1) and of mass 0.1 kg. if the temperature of the block rises by 0.4 K, what is the value of C?

A capacitor of capacitance C has charge Q. it is connected to an identical capacitor through a resistance. The heat produced in the resistance is

A capacitor of capacitance 4 muF is fully charged to a potential difference of 12 V and then charging battery is disconnected. Charged capacitor is now connected across an inductor of self-inductance of 1.2 mH. The current in the circuit at a time when the potential difference across the capacitor is 6 V is

A parallel plate capacitor of capacitance 1 mu F has a charge of + 2 mu C on one of the plates and a charge of + 4 mu C on the other. The potential difference developed across the capacitor is

Does the capacitance C of a capacitor increase , decrease or remain the same (a) when the charge q on it is doubled and (b) when the potential difference V across it is tripled?

Two parallel plate capacitors of capacitances C and 2C are connected in parallel and charged to a potential difference V. The battery is then disconnected and the region between the plates of the capacitor C is completely filled with a material of dielectric constant K. The potential differences across the capacitors now becomes...........

Two capacitors of capacitance 2muF and 3muF respectively are charged to potential difference 20 V and 40 V respectively. Now the capacitors are connected in series with a resistance such that the positively charged plate of one capacitor is connected to the positively charged plate of the other. The initial current through the resistance is I_(0) . The potential difference across the 2muF capacitor at the instant the current has reduced to (I_(0))/(2) is_______ V.

A capacitor of capacitance C is charged to a potential difference V_(0) . The charged battery is disconnected and the capacitor is connected to a capacitor of unknown capacitance C_(x) . The potential difference across the combination is V. The value of C_(x) should be

CAREER POINT-UNIT TEST 7-PHYSICS
  1. Initially K(1) is closed, now if K(2) is also closed, find heat dissip...

    Text Solution

    |

  2. The capacitance of a parallel plate condenser is C(0) If a dielectric...

    Text Solution

    |

  3. A fully charged capacitor has a capacitance 'C'. It is discharged thro...

    Text Solution

    |

  4. Find equivalent capacitance between A & B

    Text Solution

    |

  5. The potential at point A in the circuit is - (N point is grounded. Gro...

    Text Solution

    |

  6. Equivalent dielectric constant of given arrangement is

    Text Solution

    |

  7. A parallel plate capacitor having capacitance C Farad is connected wit...

    Text Solution

    |

  8. A dielectric slab of area A and thickness d is inderted between then p...

    Text Solution

    |

  9. n identical cells, each of emf epsilon and internal resistance r, are ...

    Text Solution

    |

  10. The three light bulbs in the circuit below are identical, and the batt...

    Text Solution

    |

  11. Twelve wires each of resistance 6Omega are connected to from a cube as...

    Text Solution

    |

  12. The reading of ammeter in the adjoining diagram will be

    Text Solution

    |

  13. If a given volume of water in a 220 V heater is boiled in 5 min, then...

    Text Solution

    |

  14. The temperature co-effcient of resistance of a wire is 0.00125^(@)C. A...

    Text Solution

    |

  15. In figure, the e.m.f. of the cell is 120V and internal resistance is n...

    Text Solution

    |

  16. The charge flowing through a resistance R varies with time t as Q = at...

    Text Solution

    |

  17. The V-I graph is given for two conductors of same area and length. If...

    Text Solution

    |

  18. The potential of C is :

    Text Solution

    |

  19. If a copper wire is stretched so that its length increases by 20% then...

    Text Solution

    |

  20. For the part of the circuit gives in figure, find the current followin...

    Text Solution

    |