Home
Class 12
PHYSICS
Two positive charges q(1) and q(2) are l...

Two positive charges `q_(1)` and `q_(2)` are located at points with radius vectors `vecr_(1)` and `vec r_(2)`. Find the negative charge and its radius vector which would make the force on all the charges zero.

Text Solution

Verified by Experts

The correct Answer is:
`q_(3)=(q_(1)q_(2))/(sqrtq_(1)+sqrtq_(2))^(2),vecr_(3)=(vecr_(1)sqrtq_(2)vecr_(2)sqrtq_(1))/(sqrtq_(1)+sqrtq_(2))`
Promotional Banner

Topper's Solved these Questions

  • ELECTRIC FIELD AND POTENIAL

    NN GHOSH|Exercise EXERCISE|21 Videos

  • DYNAMO, MOTOR, TRANSFORMER

    NN GHOSH|Exercise EXERCISE|8 Videos

  • ELECTROMAGNETIC INDUCTION

    NN GHOSH|Exercise EXERICISES-B|18 Videos

Similar Questions

Explore conceptually related problems

Two positive charges q_(1) and q_(2) are located at the points with redius vectors r_(1) and r_(2) . Find a negative charge q_(3) and a radius vector r_(3) of the point at which it has to be placed for the force acting on each of the three charges to be equal to zero.

A charge Q located at a point vec r is in equilibrium under the combined field of three charges q_(1), q_(2) and q_(3) . If the charges q_(1) and q_(2) are located at point vec r_(1) and vec r_(2) respectively, find the direction of the force on Q due to q_(3) in terms of q_(1),(q_2), vec r_(1) vec r_(2) , and vec(r) .

Two point charges Q_(1) and Q_(2) are positioned at points I and 2. The field intensity to the right of the charge Q_(2) on the line that passes through the two charges varies according to a law that is represented in the figure. The field intensity is assumed to be positive if its direction coincides with the positive direction on the x-axis. The distance between the charges is l. (a) Find the sign of each charge (b) Find the ratio of the absolute values of the charges |(Q_(1))/(Q_(2))| (c) Find the value of b where the field intensity is maximum [(a) Q_(2) is negative and Q_(1) is positive (b) ((l +a)/(a))^(2) , (c) (l)/(((l+a)/(a))^(2//3)-1)]

The positions of two point charges q_(1) and q_(2) are vecr_(1) and vecr_(2) , respectively. Find the position of the point where the net field is zero due to thses charges.

A positive point charge q_(1) is placed at (a,0) and another positive point charge q_(2) is placed at (0,a) . Find the force acting on q_(1) .

Two point like charges q_(1) and q_(2) are fixed in free space. At every point on the curve shown, the net electrostatic potential created by these charges is V. Find the separation r between the charges. .

Three point charges q_(1)=q,q_(2)=q and q_(3)=Q are placed at points having poisition vetors vec(r_(1)),vec(r_(2)) and (vecr_(1)+vecr_(2)) respectively. It is known that |vecr_(1)|=|vecr_(2)|=vecr . The net electrostatic force on q_(3) is sqrt(3) times the force applied by either of q_(1) or q_(2) on q_(3) . find vecr_(1)*vecr_(2) .

Assertion: Two charges q_(1) and q_(2) are placed at separation r . Then magnitude of the force on each charge is F . Reason: Now a third charge q_(3) is placed near q_(1) and q_(2) . Then force on q_(1) and q_(2) remains F .

NN GHOSH-ELECTRIC FIELD AND POTENIAL-EXERCISE-B
  1. A thin copper ring of radius a is charged with q units of electricity....

    Text Solution

    |

  2. A an electron is placed at the centre of the copper ring of problem 37...

    Text Solution

    |

  3. A thin half- ring of radiusb 20 cm is uniformly charged with a tot...

    Text Solution

    |

  4. A thin nonconducting ring of radius r has a linear charge density q=q0...

    Text Solution

    |

  5. A thin wire ring of radius r has an electric charge q. What is the ten...

    Text Solution

    |

  6. A charge +Q is uniformly distributed over a thin ring of a radius R. F...

    Text Solution

    |

  7. Three identical particals, each of charge Q=0.5 mu C and mass m=7.5xx1...

    Text Solution

    |

  8. Two small similar balls of mass m are hung by silk threads of length l...

    Text Solution

    |

  9. Calculate the field due to a uniformly charged straight conductor of ...

    Text Solution

    |

  10. Two positive charges q(1) and q(2) are located at points with radius v...

    Text Solution

    |

  11. Point charges q and -q located at the vertices of a square with diagon...

    Text Solution

    |

  12. Two co-axisal rings, each of radius R, are separated by a small distan...

    Text Solution

    |

  13. Find the potential phi of an electric field given by vecE=a(y hati+x h...

    Text Solution

    |

  14. Calculate the potential at a point on the perpendicular bisector of un...

    Text Solution

    |

  15. A ring of radius R carries a charge q uniformly distribited over it. A...

    Text Solution

    |

  16. Electric charge q is uniformly distributed in a spherical space from w...

    Text Solution

    |

  17. A copper rod AB of length l is rotated about one end A with a constan...

    Text Solution

    |

  18. A metal rectangular parallelipiped is moved parallel to itself with ...

    Text Solution

    |

  19. Three small identical netural balls are the verstices of an equila...

    Text Solution

    |

  20. Eight equal charged are placed at the eight corners of a cubewhich ...

    Text Solution

    |