Home
Class 12
PHYSICS
Explain what would happen if a 3 mm thi...

Explain what would happen if a `3` mm thick mica sheet of (dielectric constant = 6) were inserted between the plates (a) while the voltage supply remained connected (b) after the supply was disconnected.

Text Solution

Verified by Experts

(a) V = 100 V, C = 108 pF, `Q = 1.08 xx 10^(-8)` C
(b) `Q = 1.8 xx 10^(-9) C, C= 108pF, V = 16.6 V`
Promotional Banner

Topper's Solved these Questions

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    NCERT TAMIL|Exercise ADDITIONAL EXERCISES|1 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    NCERT TAMIL|Exercise ADDITIONAL EXERCISES|1 Videos

  • ELECTROMAGNETIC WAVES

    NCERT TAMIL|Exercise Evaluation (Numerical problems)|5 Videos

  • ELECTROSTATICS

    NCERT TAMIL|Exercise Exercises|23 Videos

Similar Questions

Explore conceptually related problems

Explain what would happen if in the capacitor gives in Exercise 8, a 3 mm thick mic sheet (of dielectric constant =6) were inserted between the plates, a. while the voltage remain connected. b. after the supply was disconnected.

A parallel plate capacitor of capacitance 100 microfarad is connected a power supply of 200 V. A dielectric slab of dielectric constant 5 is now inserted into the gap between the plates. (a) Find the extra charge flown through the power supply and the work done by the supply. (b) Find the change in the electrostatic energy of the electric field in the capacitor.

Shown a parallel plate capacitor with plates of width b and length l . The separation between the platesis d. The plates are rigidly clamped and connected to a battery of emf V. A dielectric slab of thickness d and dielectric constant K is slowly inserted between the plates. (a) Calculate the energy of the system when a length x of the slab is introduced into the capacitor. (b) what force should be applied on the slab to ensure that is goes slowly into the capacitor? Neglect any effect of friction or gravity.

A parallel -plate capacitor having plate area 400 cm ^2 and separation between the plate 1.0mm is connected to a power supply of 100V. A dielectric slab of thickness1.0mm and dielectric constant 5.0 is inserted into the gap .(a)Find the increase in electrostatic energy .(b) If the power supply is now disconnected and the dielectric slab is taken out , find the further increase in energy. (c) Why does the energy increase in inserting the slab as well as in taking it out?

A parallel-plate capacitor is placed in such a way that its plates are horizontal and the lower plate is dipped into a liquid of dielectric constant K and density rho . Each plate has an area A . The plates are now connected to a battery which supplies a positive charge of magnitude Q to the upper plate. Find the rise in the level of the liquid in the space between the plates. (figure)

A parallel-plalte capacitor has plate area 20cm^(2) ,plate separation 1.0mm and a dielectric slab of dielaectric constant 5.0 filling up the space between the plates.This capacitor is joined to a battery of emf 6.0V through a 100k(Omega) resistor.find the energy of the capacitor 8.9(mu)s after the connections are made.

A conducting wire ab of length l, resistance r and mass m starts sliding at t = 0 down a smooth, vertical, thick pair of connected rails as shown in . A uniform magnetic field B exists in the space in a diraction perpendicular to the plane of the rails. (a) Write the induced emf in the loop at an instant t when the speed of the wire is v. (b) what would be the magnitude and direction of the induced current in the wire? (c) Find the downward acceleration of the wire at this instant. (d) After sufficient time, the wire starts moving with a constant velocity. Find this velocity v_m. (e) Find the velocity of the wire as a function of time. (f) Find the displacement of the wire as a functong of time. (g) Show that the rate of heat developed inte wire is equal to the rate at which the gravitational potential energy is decreased after steady state is reached.

A parallel-plate of capacitor of capacitance 5mu F is connected in a battery of emf 6V. The separation between the plate is 2mm.(a) Find the charge on the positive plate.(b) find the eletric field between the plate.(c) A dielectric slab of thickness 1 mm and dielectric constant 5 is inserted into the gap to occupy the lower half of it.Find the capacitance of the new combination .(d)How much charge has flow n through the battery after the slab is inserted?

In a parallel plate capacitor with air between the plates, each plate has an area of 6 xx 10^(-3) m^(2) and the distance between the plates is 3mm. Calculate the capcitance of the capacitor. If this capacitor is connected to a 100V supply, what is the charge on each plate of hte capacitor?

A capacitor having a capacitance of 100 mu f is changed to a potential difference of 50V. (a) What is the magnitude of the charge on each plate? (b)The charging battery is disconnected and a dielectric of dielectric constant 2.5 is inserted . Calculate the new potential difference between the plate .

NCERT TAMIL-ELECTROSTATIC POTENTIAL AND CAPACITANCE -EXERCISES
  1. Three capacitors of capacitance 2 pF, 3 pF and 4 pF are connected in...

    Text Solution

    |

  2. In a parallel plate capacitor with air between the plates, each plate...

    Text Solution

    |

  3. Explain what would happen if a 3 mm thick mica sheet of (dielectric ...

    Text Solution

    |

  4. A 12 pF capacitor is connected to a 50 V battery. How much electrost...

    Text Solution

    |

  5. A 600pF capacitor is charged a 200V supply. It is then disconnnected f...

    Text Solution

    |

  6. A cube of side b has a charge q at each of its vertices. Determine the...

    Text Solution

    |

  7. Two tiny spheres carrying charges 1.5 muC and 2.5 muC are located 30 c...

    Text Solution

    |

  8. A spherical conducting shell of inner radius r(1) and outer radius r(2...

    Text Solution

    |

  9. Show that the normal component of electrostatic field has a discontinu...

    Text Solution

    |

  10. A long charged cylinder of linear charge density lambda is surrounde...

    Text Solution

    |

  11. In a hydrogen atom, the electron and proton are bound at a distance of...

    Text Solution

    |

  12. If one of the two electrons of a hydrogen molecule is removed, we get ...

    Text Solution

    |

  13. Two charged conducting spheres of radii a and b are connected to eac...

    Text Solution

    |

  14. Two charges -q and +q are located at points (0, 0, –a) and (0, 0, a), ...

    Text Solution

    |

  15. Figure shows a charge array known as an electric quadrupole. For a poi...

    Text Solution

    |

  16. An electrical technician requires a capacitance of 2 muF in a circuit ...

    Text Solution

    |

  17. What is the area of the plates of a 2 F parallel plate capacitor, give...

    Text Solution

    |

  18. Obtain the equivalent capacitance of the network in figure below. For ...

    Text Solution

    |

  19. The plates of a paralllel plate capacitor have an area of 90 cm^(2) e...

    Text Solution

    |

  20. A 4 muF capacitor is charged by a 200 V supply. It is then disconnect...

    Text Solution

    |