Home
Class 12
PHYSICS
Two equal charges q are placed at a dist...

Two equal charges `q` are placed at a distance of `2a` and a third charge `-2a` is placed at the midpoint. The potential energy of the system is

A

`(q^(2))/(8 pi epsilon_(0)a)`

B

`(6q^(2))/(8 pi epsilon_(0)a)`

C

`-(7q^(2))/(8 pi epsilon_(0)a)`

D

`-(9q^(2))/(8 pi epsilon_(0)a)`

Text Solution

Verified by Experts

The correct Answer is:
C
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

Two charges of equal magnitude q are placed in air at a distance 2a apart and third charge -2q is placed at mid-point . The potential energy of the system is (epsi_(0) = permittivity of free space)

Two point charges 2q and 8q are placed at a distance r apart. Where should a third charge -q be placed between them so that the electrical potential energy of the system is a minimum

Two point charges q each are fixed at (a,0) and (-a,0). A third charge Q is placed at origin. Electrons potential energy of the system will

Two free charges q and 4q are placed at a distance d apart A third charge Q is placed between them at a distance x from charge q such that the system is in equilibrium. Then magnitude of third charge and postion,

Two free charges q and 4q are placed at a distance d apart A third charge Q is placed between them at a distance x from charge q such that the system is in equilibrium. Then

Charges 2q and 8q are placed at the end points A and B repsectively of a 9 cm long straight line. A third charge q is placed at a point C of AB such that the potential energy of the system is minimum . The distance of C from A is

Two equal charges, +Q each, are at a distance r from each other. A third charge is placed on the line joining the above two charges such that all these charges are in equilibrium. Find q, in terms of Q.

Two identical charges are placed at the two corners of an equilateral triangle. The potential energy of the system is U. The work done in bringing an identical charge from infinity to the third vertex is

DC PANDEY-ELECTROSTATIC POTENTIAL AND CAPACITORS-(A) Chapter exercises
  1. A mass m=20 g has a charge q= 3.0 mC. It moves with a velocity of 20 m...

    Text Solution

    |

  2. Four idenbtial charges +50 mu C each are placed, one at each corner of...

    Text Solution

    |

  3. Two equal charges q are placed at a distance of 2a and a third charge ...

    Text Solution

    |

  4. An alpha-particle is accelerated through a.p.d of 10^(6) volt the K.E....

    Text Solution

    |

  5. The ratio of moment of an electron and an alpha-particle which are acc...

    Text Solution

    |

  6. Two particles of mass m and 2m with charges 2q and q are placed in a u...

    Text Solution

    |

  7. A spherical condenser has innder and outer spheres of radii a and b re...

    Text Solution

    |

  8. Three charges are placed at the vertices of an equilateral triangle of...

    Text Solution

    |

  9. A particle of mass 2 g and charge 1 muC is held at rest on a frictionl...

    Text Solution

    |

  10. A point charge is surrounded symmetrically by six identical charges at...

    Text Solution

    |

  11. Five capacitors of 10 muF capacity each are connected to a d.c potenti...

    Text Solution

    |

  12. Three capacitors of capacitances 3 muF, 9muF and 18 muF are connected ...

    Text Solution

    |

  13. In the circuit diagram shown in the adjoining figure, the resultant ca...

    Text Solution

    |

  14. Four capacitors of each of capacity 3 muF are connected as shown in th...

    Text Solution

    |

  15. What is the equivalent capacitance between A and B in the given figure...

    Text Solution

    |

  16. Four capacitors are connected as shown . The equivalent capacitance be...

    Text Solution

    |

  17. The total capacity of the system of capacitors shown in the adjoining ...

    Text Solution

    |

  18. Four capacitors are connected in a circuit as shown in the figure. The...

    Text Solution

    |

  19. In the given network capacitance, C(1) = 10muF, C(2) = 5 muF and C(3) ...

    Text Solution

    |

  20. The equivalent capacitance between points A and B is

    Text Solution

    |