Home
Class 12
PHYSICS
A ball of mass m=0.5kg is suspended by a...

A ball of mass `m=0.5kg` is suspended by a thread and a charge `q=0.1muC` is supplied when a ball with diameter `5cm` and a like charge of same magnitude is brought close to the first ball but below it the tension decreases to `1//3` of its initial value .The distance between centres of the balls is

Text Solution

Verified by Experts

The correct Answer is:
`0.52 xx 10^(-3)M, 1.3 xx 10^(-3)C//m^(2)`
Promotional Banner

Topper's Solved these Questions

  • ELECTRIC FIELD AND POTENIAL

    NN GHOSH|Exercise EXERCISE-B|35 Videos

  • ELECTRIC FIELD AND POTENIAL

    NN GHOSH|Exercise EXERCISE-B|35 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

A ball of mass 0.1 kg is suspended by a string. It is displaced through an angle of 60^(@) and left. When the ball passes through the mean position, the tension in the string is

A ball of mass 0.1kg is suspended by a string 30 cm long Keeping the string always taut the ball describe a horizontal circle of radius 15cm Calculate the angular speed of the ball .

Calculate the interaction energy of two balls whose charges q_(1) and q_(2) are spherically. The distanace between teh centres of the balls is equal to l .

Two identical small equally charged conducting balls are suspended from long threads secured at one point. The charges and masses of the balls are such that they are in equilibirum whaen th distance between them is a(the length of thread Lgtgta ). Then one of the balls is discharged. what will be the distance b(bltltL) between the balls when equilibrium is restored?

A small ball of paper has mass 9xx10^(-5) kg and carries a charge of 5muC . When it is held over another charged ball of paper at a distance of 2cm above it, the two balls stay in equilibrium. What is the charge on the second hall ?

A charged ball of mass 5.88xx10^(-4) kg is suspended from two silk strings of equal lengths so that the strings are inclined at 60^(@) with each other. Another ball carrying a charge which is equal in magnitude but opposite in sign of the first one is placed vertically below the first one at a distance of 4.2xx10^(-2) m . Due to this, the tension in the strings is doubled. Determine the charge on the ball and the tension in the strings after electrostatic interaction. (g=9.8 m//s^(2))

A small positively charged ball of mass m is suspended by an insulating thread of length L. This ball remains in equilibrium with string horizontal when another small charged ball is placed exactly at a distance L below the point of suspension of the first ball. The second ball is slowly moved away from the first ball to a far away point. (The second ball is moved horizontally so that the first ball does not accelerate). As a result the first ball lowers down to the original position of the second ball and the string become vertical. Find the work done by the external agent in removing the second ball.

Two balls with charges 5muC" and "10muC are at a distance between them to 0.5 m, the amount of work to be performed is

Two balls of the same radius and weight are suspended on threads so that their surface are in contact. A charge of q_(0) = 4 xx 10^(-7)C is given to the balls which makes them repel each other and diverge to an angle of 60° . Find the mass of the balls if the distance of balls from the point of suspension to the centre of ball is 20cm. Find the density of the material of the balls if the angle of divergence becomes 54° when the balls are immersed in kerosene of density 800kg m^(-3) dielectric constant ofkerosene is epsilon_(r) = 2 [1.592g, 255 K//g m^(3)]

A metal ball of radius R = 1.5 cm has a charge q = 10 muC . Find the molecules of the vector fo the resultant force acting on a charge located on one half of the ball.

NN GHOSH-ELECTRIC FIELD AND POTENIAL-EXERCISE
  1. Two charges of +4 xx 10^(-7)C and -8 xx 10^(-7)C are 20cm apart. Find ...

    Text Solution

    |

  2. A negative charge q(1)=50 xx 10^(-9)C and a positive charge q(2)=25 xx...

    Text Solution

    |

  3. Two pith balls,, each weighting 10mg are suspended from the sam point ...

    Text Solution

    |

  4. A ball of mass m=0.5kg is suspended by a thread and a charge q=0.1muC ...

    Text Solution

    |

  5. An alpha paritcle carrying an electric charge 3.2 xx 10^(-19)C is at a...

    Text Solution

    |

  6. A charges of 50 xx 10^(-9)C is placed at a point P. What amount of wor...

    Text Solution

    |

  7. A small uncharged sphere is placed in contact with an equal and simila...

    Text Solution

    |

  8. An electron is projected with an initial velocity of 10^(7)ms^(-1) int...

    Text Solution

    |

  9. A positive point charge 50mu C is located in the plane xy at a point w...

    Text Solution

    |

  10. Charges of +q,+2q,+q and -q, are placed at the cornersof a square ABCD...

    Text Solution

    |

  11. Two small equal spheres carrying unlike and unequal charges are placed...

    Text Solution

    |

  12. Two small conducters 0.3 m apart carry 10xx10^(-9)C and 20xx10^(-9)C o...

    Text Solution

    |

  13. An electron of mass 9xx10^(-31) kg carrying 1.6xx10^(-19)C starts from...

    Text Solution

    |

  14. Calculate the radius of a drop of water which remains suspended in the...

    Text Solution

    |

  15. ABCD is a square of side 0.2 M. Positive charges 2xx10^(-9)C,4xx10^(-9...

    Text Solution

    |

  16. Two charges +2xx10^(-9)C and -8xx10^(-9)C are placed 0.3 M apart in ai...

    Text Solution

    |

  17. Two charges 4 cm apart repel each other with a force of 2xx10^(-2)N in...

    Text Solution

    |

  18. Charges of magnitude (1)/(2),(2)/(3),(3)/(3) and (4)/(3) nanocolumb ar...

    Text Solution

    |

  19. Four small spheres carrying +(5)/(3),+(10)/(3),+(5)/(3) and -(5)/(3)nC...

    Text Solution

    |

  20. An electron is liberated from a hot filament and attracted by an anode...

    Text Solution

    |