Home
Class 11
PHYSICS
For the system shown below, the value of...

For the system shown below, the value of Q for which resultant force on q is zero is

Text Solution

Verified by Experts

For force on q to be zero, charges q and Q must be of opposite of nature. Net attraction force on q due to charge Q= Repulsion force on q due to q
`sqrt(2) F_(A)=F_(R) rArr sqrt(2) (kQq)/a^(2)=(kq^(2))/((sqrt(2)a)^(2)) rArr q=2sqrt(2) Q` Hence `q=-2sqrt(2) Q`
Promotional Banner

Topper's Solved these Questions

  • MISCELLANEOUS

    ALLEN|Exercise Part -II Example Some worked out Examples|1 Videos

  • MISCELLANEOUS

    ALLEN|Exercise Exercise-01|87 Videos

  • MISCELLANEOUS

    ALLEN|Exercise Question|1 Videos

  • KINEMATICS (MOTION ALONG A STRAIGHT LINE AND MOTION IN A PLANE)

    ALLEN|Exercise BEGINNER S BOX-7|8 Videos

  • PHYSICAL WORLD, UNITS AND DIMENSIONS & ERRORS IN MEASUREMENT

    ALLEN|Exercise EXERCISE-IV|8 Videos

Similar Questions

Explore conceptually related problems

Two equal point charges Q=+sqrt(2) mu C are placed at each of the two opposite corners of a square and equal point charges q at each of the other two corners. What must be the value of q so that the resultant force on Q is zero?

R.Q. is zero in

In net force on a system is zero then

Find the magnitude of the resultant of shown forces :-

A charges Q is placed at each of the two opposite corners of a square. A charge q is placed to each of the other two corners. If the resultant force on each charge q is zero, then

A charges Q is placed at each of the two opposite corners of a square. A charge q is placed to each of the other two corners. If the resultant force on each charge q is zero, then

Two forces of magnitudes P and Q are inclined at an angle (theta) . The magnitude of their resultant is 3Q. When the inclination is changed to (180^(@)-theta) , the magnitude of the resultant force becomes Q. Find the ratio of the forces.

For the following system shown assume that pulley is frictionless, string is massless (m remains on M), Q. The force on the ceiling is

For the following system shown assume that pulley is frictionless, string is massless (m remains on M), Q. The force on the ceiling is

Assertion : Five charges +q each are placed at five vertices of a regular pentagon. A sixth xharge -Q is placed at the centre of pentagon. Then, net electrostatic force on -Q is zero. Reason : Net electrostatic potential at the centre is zero.

ALLEN-MISCELLANEOUS-Part -II Example
  1. A particle of mass m carrying charge q(1) is revolving around a fixed ...

    Text Solution

    |

  2. The force of repulsion between two point charges is F, when these are ...

    Text Solution

    |

  3. For the system shown below, the value of Q for which resultant force o...

    Text Solution

    |

  4. Two identical charged sphere are suspended by strings of equal length....

    Text Solution

    |

  5. Given a cube with point charges q on each of its vertices. Calculate t...

    Text Solution

    |

  6. Five point charge each of value +q are placed on five vertices of a re...

    Text Solution

    |

  7. Calculate the electric field at origin due to infinite number of charg...

    Text Solution

    |

  8. A charges particles particle is kept in equilibrium in the electric fi...

    Text Solution

    |

  9. Calculate the electric field intensity E which would be just sufficien...

    Text Solution

    |

  10. If a point charge q is placed at the centre of a cube. What is the f...

    Text Solution

    |

  11. A point charge Q is placed at one corner of a cube. Find flux passing ...

    Text Solution

    |

  12. Figure shows a closed dotted surface which intersects a conduccting un...

    Text Solution

    |

  13. Consider a uniform electric field E = 3 xx 10^(3) hat(i)N//C. (ii)...

    Text Solution

    |

  14. Find the electric field due to an infinitely long cylindrical charge d...

    Text Solution

    |

  15. A point charge of 0.009 mu C is placed at origin. Calculate intensit...

    Text Solution

    |

  16. A proton moves with a speed of 7.45xx10^(5) m//s dirctly towards a fre...

    Text Solution

    |

  17. A charge 2 muC is taken from inifinity point in an electric field, wit...

    Text Solution

    |

  18. 1 mu C charge is shifted from A to B and it is found that work done by...

    Text Solution

    |

  19. Electric potential at any point is V=-5x +3y+sqrt(15)z, then the magni...

    Text Solution

    |

  20. A system has two charges qA = 2.5 xx 10^(–7) C and qB = –2.5 xx 10^(...

    Text Solution

    |