Home
Class 12
PHYSICS
A charge +Q is uniformly distributed ove...

A charge +Q is uniformly distributed over a thin ring of the radius R. The velocity of an electron at the moment when it passes through the centre O of the ring, if the electron was initially at far away on the axis of the ring is (m=mass of electron, `K=1/(4pi epsi_(0))`)

A

`sqrt(((2KQe)/(mR)))`

B

`sqrt(((Kqe)/m))`

C

`sqrt(((Kme)/(QR)))`

D

`sqrt(((Kqe)/(mR)))`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ELECTROSTATIC POTENTIAL AND CAPACITORS

    DC PANDEY|Exercise (B) Chapter exercises|20 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITORS

    DC PANDEY|Exercise (C) Chapter exercises|50 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITORS

    DC PANDEY|Exercise Check point 2.5|20 Videos

  • ELECTROMAGNETIC WAVES

    DC PANDEY|Exercise Sec C|22 Videos

  • ELECTROSTATICS

    DC PANDEY|Exercise Medical entrances gallery|37 Videos

Similar Questions

Explore conceptually related problems

A charge +Q is uniformly distributed over a thin ring of a radius R. Find the velocity of a negative point charge -Q at the moment it passes through the centre of the ring if it was initially at rest at infinity on the axis of the ring. The mass of the charge-Q is equal to m.

Charges q is uniformly distributed over a thin half ring of radius R . The electric field at the centre of the ring is

A charge Q is uniformly distributed only on the fourths portion of a ring of radius R . The elctric potential at centre of ring is

A charge Q is uniformly distributed over a ring of radius a.Obtain an expression for electric field intensity at a point on the axis of ring. show that at far point ring behaves as a point charge.

A charge +Q is uniformluy distributed over a thin ring with radus R. a negative point charge -Q and mass m starts from rest at a pont far away from the centre of the ring and moves towardsn then centre. Find the velocity of this particle at the moment it passes through the centre of the ring .

A charge Q is distributed uniformly on a ring of radius R as shown in the following diagrams. Find the electric potential at the centre O of the ring

A charge Q is distributed uniformly on a ring of radius R as shown in the following diagrams. Find the electric potential at the center O of the ring. (a)

A charge of 500 muC is distributed uniformly over the circumference of a ring of radius 25 cm. What will be be electric potential at the centre of ring?

DC PANDEY-ELECTROSTATIC POTENTIAL AND CAPACITORS-(A) Chapter exercises
  1. A parallel plate capacitor with air as medium between the plates has a...

    Text Solution

    |

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

    Text Solution

    |

  3. A charge +Q is uniformly distributed over a thin ring of the radius R....

    Text Solution

    |

  4. A parallel plate capacitor of capacitance C is connected to a battery ...

    Text Solution

    |

  5. Condenser A has a capacity of 15 muF when it is filled with a medium o...

    Text Solution

    |

  6. In the given if point C is connected to the earth and a potential of +...

    Text Solution

    |

  7. A network of four capacitors of capacity equal to C(1) = C, C(2) = 2C,...

    Text Solution

    |

  8. Figures shows three spherical and equipotential surfaces 1,2 and 3 rou...

    Text Solution

    |

  9. A charged oil drop of mass 2.5xx10^(-7)kg is in space between the two ...

    Text Solution

    |

  10. A capacitor of 4 mu F is connected as shown in the circuit. The intern...

    Text Solution

    |

  11. A parallel plate capacitor is made of two dielectric blocks in series....

    Text Solution

    |

  12. A number of capacitors each of capacitance 1 muF and each one of whic...

    Text Solution

    |

  13. A series combination of n(1) capacitors, each of value C(1), is charge...

    Text Solution

    |

  14. Two charges +6 muC and -4 muC are placed 15 cm apart as shown. At what...

    Text Solution

    |

  15. Assume that an electric field vec(E) = 30 x^(2) hat(i) exists in spac...

    Text Solution

    |

  16. An electron initially at rest falls a distance of 1.5 cm in a uniform ...

    Text Solution

    |

  17. A long, hollow conducting cylinder is kept coaxially inisde another lo...

    Text Solution

    |

  18. The potential at a point x ( measured in mu m) due to some charges sit...

    Text Solution

    |

  19. Three charges Q, +q and +q are placed at the vertices of a right-angle...

    Text Solution

    |

  20. Four point charges each +q is placed on the circumference of a circle ...

    Text Solution

    |