Home
Class 12
PHYSICS
Four point +ve charges of same magnitude...

Four point +ve charges of same magnitude (Q) are placed at four corners of a rigid square frame as shown in fig.The plane of the frame is perpendicular to Z-axis. If a –ve point charge is placed at a distance z away from the above frame then :

A

–ve charge oscillates along the Z-axis

B

it moves away from the frame

C

it moves slowly towards the frame and stays in the plane of the frame

D

It passes through the frame only one

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Four charges equal to -Q are placed at the four corners of a square and a charge q is at its centre. If the system is in equilibrium the value of q is

Two positive charges of magnitude q are placed at the ends of a side ( side 1) of a square of side 2a . Two negative charges of the same magnitude are kept at the other corners . Staring from rest , a charge Q moves from the middle of side 1 to the centre of square , its kinetic energy at the centre of square is -.

Four identical thin rods each of mass M and length l from a square frame. Moment of inerita of this frame about an axis through the centre of the square and perpendicular to its plane is ……………

six charges of equal magnitude, 3 poistive and 3 negative are to be placed on PQRSTU corners of a regular hexagon, such that field at the centre is double that of what it would have been if only one +ve charge is placed at R. Which of the following arrangement of charge is posisble for P, Q, R, S, T and U respectively.

Four charges of 1mu C, 2mu C, 3mu C and -6 mu C are placed one at each corner of the square of side 1 m . The square lies in the x-y plane with its centre at the origin.The electric field at the centre

Four charges are arranged at the corners of a square ABCD of side d, as shown in Fig. 2.15.(a) Find the work required to put together this arrangement. (b) A charge q_(0) is brought to the centre E of the square, the four charges being held fixed at its corners. How much extra work is needed to do this?

Four charges are placed at the circumference of a dial clock as shown in figure. If the clock has only hour hand, then the resultant force on a charge q_(0) placed at the centre, points in the direction which shows the time as :-

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?

The method of electrical images is used to solve the electrostatic problems, where charge distribution is not specified completely. The method consists of replacement of given charge distribution by a simplified charge distribution or a signal point charge or a number of point charges [rovided the original boundary conditions are still satisfied. For example consider a system consider a system containing a point charge q placed at a distance d of form an infinite conducting plane. The boundary conditions are : (i) Potential is zero at infinity (ii) Potential is zero at each point on the conducting plane If we replaced the conducting plane by a point charge (-q) placed at a distance 'd' opposite to conducting plane. The charge (-q) is called the electrical image. Now system consists of two charge +q an -q at seperation 2d . If charge +q moves to a distance 'y' from the boundary of conducting plane (now absent), the electrical image -q also moves to the same 'y' from the boundary of conducting plane, so that the new distance between +q and -q is 2y The potential energy of system of charge +q placed at a distance d from the earthed conducting plane is

ALLEN -TEST PAPER 3-PHYSICS
  1. A charge Q1 exerts some force on a second charge Q2. If a 3rd charge Q...

    Text Solution

    |

  2. Two particles A and B having equal charges are placed at distance d ap...

    Text Solution

    |

  3. An infinite number of charges, each of magnitude q, are placed along x...

    Text Solution

    |

  4. Two pitch balls carrying equal charges are suspended from a common poi...

    Text Solution

    |

  5. Two spheres A and B are charged with the charges of +10 and +20 coulom...

    Text Solution

    |

  6. The electric field due to a uniformly charged sphere is maximum at :

    Text Solution

    |

  7. Charges q, 2q,3q and 4q are placed at the corners A,B,C and D of a squ...

    Text Solution

    |

  8. A charged oil drop is suspended in a uniform filed of 3xx10^4 v//m so ...

    Text Solution

    |

  9. The electric field at a distance (3R)/2 from the centre of a charged ...

    Text Solution

    |

  10. Four point +ve charges of same magnitude (Q) are placed at four corner...

    Text Solution

    |

  11. A thin semi-circular ring of radius r has a positive charge q distribu...

    Text Solution

    |

  12. Three positive charges of equal value q are placed at the verticles of...

    Text Solution

    |

  13. A Gaussian surface in the fig. is shown by dotted line. The electric f...

    Text Solution

    |

  14. The length of each side of a cubical surface is l. If charge q is situ...

    Text Solution

    |

  15. A positively charged body 'A' has been brought near a neutral brass sp...

    Text Solution

    |

  16. Inside a charged hollow spherical conductor. the potential :-

    Text Solution

    |

  17. Equal charges q are placed at the three corners B, C, D of a square A...

    Text Solution

    |

  18. Charges are placed on the verticles of a as shown. Let vec(E) be the e...

    Text Solution

    |

  19. The variation of potential with distance r from a fixed point is shown...

    Text Solution

    |

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

    Text Solution

    |