Home
Class 12
PHYSICS
A and B are two concentric spherical she...

A and B are two concentric spherical shells made of conductor. Their radii are R and 2R respectively. The two shells have charge Q and – 2Q on them. An electron escapes from the surface of the inner shell A and moves towards a small hole in the outer shell B. (a) What shall be the minimum kinetic energy of the emitted electron so that it can escape to infinity through the small hole in outer shell? (b) What will be your answer if charge on both the shells were +Q? Charge on electron = e.

Text Solution

Verified by Experts

The correct Answer is:
(a). `(Kqe)/(2R)`
(b). `(3)/(2)(Kqe)/(R)`
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Consider two concentric spherical metal shells of radii r_(1) and r_(2) (r_(2) gt r_(1)) . If the outer shell has a charge q and the inner one is grounded, then the charge on the inner shell is

Two concentric spherical shells fo radill R and 2R are given charges Q_(1) and Q_(2) respectively. The surfaces charge densities of the outer surfaces are equal. Determine the ratio Q_(1) : Q_(2) .

Consider two concentric metalic shell's of radii R and 2R. The inner shell is having charge Q and outer shell is uncharged. If they are connected with a conducting wire. Then,

Two concentric spherical shells of radii R and 2R have charges Q and 2Q as shown in figure If we daw a graph between electric field E and distance r from the centre, it will be like

There are two concentric metallic shells of radii R and 2R, if outer shell is given charge q_1 , then charge on surface of inner shell will be

Three concentric conducting spherical shells carry charges as : +4Q on the inner shell, -2Q on the middle shell and -5Q on the outer shell. The charge on the inner surface of the outer shell is

The radii of two concentric spherical conducting shells are r_(1) and r_(2)(gt r_(1)) . The change on the oute shell is q. The charge on the inner shell which is connected to the earth is

There are two concentric conducting spherical shells of radii 10 cm and 20 cm. The outer shell is charged to a potential of 50esu while inner shell is earthed. The charge on outer shell is

Charges Q, 2Q , and -Q are given to three concentric conducting sphereical shells A, B and C respectively as shown in figure. The ratio of charge on the inner and outer surface of shell C will be

ARIHANT-ELECTROSTATICS-Level 2
  1. A point charge q is placed at a distance x from the centre of a conduc...

    Text Solution

    |

  2. A conductor is placed in a uniform external electric field (see figure...

    Text Solution

    |

  3. Two concentric spherical shells have radii R and 2R. The outer shell i...

    Text Solution

    |

  4. There charges q, 3q and 12q are to be placed on a straight line AB hav...

    Text Solution

    |

  5. Two square of sides a and 2a are placed in xy plane with their centers...

    Text Solution

    |

  6. A certain charge distribution produces electric potential that varies ...

    Text Solution

    |

  7. A simple pendulum of length l has a bob of mass m , with a charge q on...

    Text Solution

    |

  8. Below the fixed end O of the insulating horizontal thread OB, there is...

    Text Solution

    |

  9. A small positively charged ball of mass m is suspended by an insulatin...

    Text Solution

    |

  10. A particle (A) having charge Q and mass m is at rest and is free to mo...

    Text Solution

    |

  11. In the last question, the two particles A and B are initially held at ...

    Text Solution

    |

  12. Two positively charged balls having mass m and 2 m are released simult...

    Text Solution

    |

  13. A and B are two concentric spherical shells made of conductor. Their r...

    Text Solution

    |

  14. A thin uniform rod of mass M and length 2L is hinged at its centre O s...

    Text Solution

    |

  15. Two charge particles are moving such the distance between them remains...

    Text Solution

    |

  16. Two blocks A and B are connected by a spring made of a non conducting ...

    Text Solution

    |

  17. Large number of identical conducting spheres have been laid as shown i...

    Text Solution

    |

  18. A short electric dipole has dipole moment p. Find the distance of fart...

    Text Solution

    |

  19. Two identical electric dipoles are arranged parallel to each other wit...

    Text Solution

    |

  20. A ring of radius r has a uniformly spread charge + q on quarter of its...

    Text Solution

    |