Home
Class 12
PHYSICS
Two long coaxial cylindrical metal tubes...

Two long coaxial cylindrical metal tubes stand on an insulatiog floor as shown in figure. A dielectric oil is filled in the annular region between the tubes. The tubes are maintained at a constant potential difference `V`. A small hole is opened at bottom then :

A

Reading of ammeter remain constant

B

Capacitance of system increases

C

Current in circuit is dependent on area ofhole

D

Current in circuit is inversely proportional to dielectric constant

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • CAPACITANCE

    PHYSICS GALAXY - ASHISH ARORA|Exercise ADVANCE MCQS|26 Videos
  • CAPACITANCE

    PHYSICS GALAXY - ASHISH ARORA|Exercise UNSOLVED NUMERICAL PROBLEMS|40 Videos
  • CAPACITANCE

    PHYSICS GALAXY - ASHISH ARORA|Exercise CONCEPTUAL MCQA|32 Videos
  • ATOMIC PHYSICS

    PHYSICS GALAXY - ASHISH ARORA|Exercise Unsolved Numerical Problems|39 Videos
  • CURRENT ELECTRICITY

    PHYSICS GALAXY - ASHISH ARORA|Exercise All Questions|389 Videos

Similar Questions

Explore conceptually related problems

Two long cylindrical metal tubes stand on insulating floor. A dielectric oil is filled between plates. Two tubes are maintained with potential difference v. A small hole is opened at bottom then

Two long coaxial cylindrical metal tubes (inner radius a, outer radius b) stand vertically in a tank of dielectric oil (of mass density rho , dielectric constant K). The inner one is maintained at potential V and the outer one is grounded. To what equilibrium height (h) does the oil rise in the space between the tubes? [Assume this height ( h) as an equilibrium height]

Figure shows two identical caoacitors C_1 and C_2 each of 1.5muF caoacitance, connected to a battery of 2 V. Initially switch 'S' is closed. After some time 's' is left open and dielectric slabs of dielectric constant K=2 are inserted to fill completely the space between the plates of the two capacitors. How will the (i) charge and (ii) potential difference between the plates of the capacitors be affected after the slabs are inserted.

One conducting U tube can slide inside another as shown in figure, maintaining electrical contacts between the tubes. The magnetic field B is perpendicular to the plane of the figure. If each tube maoves towards the other at a constant speed v. Then the emf induced in the circuit in terms of B, l and v where l is the width of each tube will be

Two discharge tubes have identical material structure and the same gas is filled in them. The length of one tube is 10cm and that of th other tube is 20cm. Sparking starts in both the tubes when the potential difference between the cathode and the anode is 100 V . If the pressure in the shorter tube is 1.0 mm of mercury, what is the pressure in the longer tube?

A cathode ray tube contains a pair of parallel metal plates 1*0cm apart and 3*0cm long. A narrow horizontal beam of electrons with velocity of 3xx10^7ms^-1 is passed down the tube mid way between the two plates. When the potential difference of 550V is maintained across the plates, it is found that the electron beam is so deflected that it just strikes the end of one of the plates. Find the specific charge of an electron.

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...........

Figure shows two identical capacitors C_1 and C_2 each of 2muF capacitance, connected to a battery of 5 V. Initially switch 'S' is closed. After some time 'S' is left open and dielectric slavs of dielectric constant K = 5 are inserted to fill completely the space between the plates of the two capacitors. How will the (i) charge and (ii) potential difference between the plates of the capacitors be affected after the slabs are inserted?

PHYSICS GALAXY - ASHISH ARORA-CAPACITANCE-NUMERICAL MCQS
  1. Two parallel plate capacitors of capacitances C and 2C are connected i...

    Text Solution

    |

  2. In a circuit shown in the figure, what is potential of point A?

    Text Solution

    |

  3. Two long coaxial cylindrical metal tubes stand on an insulatiog floor ...

    Text Solution

    |

  4. Find the time constant for the given RC circuits in correct order (in ...

    Text Solution

    |

  5. The capacities and connection of five capacitors are shown in the adjo...

    Text Solution

    |

  6. In the circuit shown here C(1) = 6muF, C2 = 3muF and battery B = 20V. ...

    Text Solution

    |

  7. Three plates A, B, C each of area 50 cm^(2) have separation 3 mm betwe...

    Text Solution

    |

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

    Text Solution

    |

  9. A parallel plate capacitor with air between the plates has capacitance...

    Text Solution

    |

  10. Six plates each of area A arranged as shown· in figure. The separation...

    Text Solution

    |

  11. Six capacitors each of capacitance of 2muF are connected as shown in t...

    Text Solution

    |

  12. What is equivalent capacitance of ladder circuit shown in figure betwe...

    Text Solution

    |

  13. Find the equivalent capacitance between terminals A and B in the circu...

    Text Solution

    |

  14. Circuit in figure shows three capacitors with capacitance and their br...

    Text Solution

    |

  15. A 2muF capacitor is charged as shown in the figure. The percentage of ...

    Text Solution

    |

  16. For the circuit shown in figure, which of the below options given is/a...

    Text Solution

    |

  17. In the circuit shown, a potential difference of 60V is applied acrodd....

    Text Solution

    |

  18. Four identical capacitors are connected in series with a 10 V battery...

    Text Solution

    |

  19. Find the equivalent capacitance across A and B for the arrangement sho...

    Text Solution

    |

  20. The equivalent capacitance between X and Y is

    Text Solution

    |