Home
Class 12
PHYSICS
What equal charges would have to be plac...

What equal charges would have to be placed on earth and moon to neutralize their gravitational force of attraction?
Given that mass of earth `= 10^(25) kg` and mass of moon `= 10^(23) kg`

Text Solution

Verified by Experts

The correct Answer is:
`8.6xx10^(13)C`
Use `(Gm_(1) m_(2))/(r^(2)) = k (qq)/(r^(2))`
Promotional Banner

Topper's Solved these Questions

  • ELECTROSTATICS

    PRADEEP|Exercise FILL IN THE BLANKS|8 Videos

  • ELECTROSTATICS

    PRADEEP|Exercise PROBLEMS FOR PRACTICE|8 Videos

  • ELECTROSTATICS

    PRADEEP|Exercise VALUE BASED QUESTIONS|7 Videos

  • ELECTRONIC DEVICES

    PRADEEP|Exercise Fill in the Blanks|1 Videos

  • MAGNETIC EFFECT OF CURRENT AND MAGNETISM

    PRADEEP|Exercise Competition Focus (Multiple Choice Questions)|2 Videos

Similar Questions

Explore conceptually related problems

The distance between earth and moon is 3.8 xx 10^(8)m . Determine the gravitational potential energy of earth-moon system. Given, mass of the earth = 6 xx 10^(24) kg , mass of moon = 7.4 xx 10^(22)kg and G = 6.67 xx 10^(-11) Nm^(2) kg^(-2)

A rocket is fired the Earth towards the Moon. At what distance from the Moon is the gravitational force on the rocket is zero. Mass of Earth is 6 xx 10^(24) kg , mass of moon is 7.4xx 10^(22) kg and distance between moon and earth is 3.8xx 10^(8)m . Neglect the effect of the sun and other planes.

Calculate the value of acceleration due to gravity on moon. Given mass of moon =7.4xx10^(22) kg, radius of moon =1740 km.

The distance between the moon and earth is 3.8 xx 10^(8)m . Find the gravitional potential at the mid point of the joining them. Given that the mass of the earth is 6 xx 10^(24) kg , mass of moon = 7.4 xx 10^(22) kg and G = 6.67 xx 10^(11) Nm^(2)kg^(-2) .

Find the distance of a point from the earth's centre where the resultant gravitational field due to the earth and the moon is zero. The mass of the earth is 6.0xx10^(24)kg and that of the moon is 7.4xx10^(22)kg . The distance between the earth and the moon is 4.0xx10^(5)km .

Find the distance of a point from the earth's centre where the resultant gravitational field due to the earth and the moon is zero. The mass of the earth is 6.0xx10^24 kg and that of the moon is 7.4x10^22 kg. The distance between the earth and the moon is 4.0xx10^5km .

Find the distance of a point from the earth's centre where the resultant gravitational field due to the earth and the moon is zero The mass of the earth is 6.0 xx 10^(24)kg and that of the moon is 7.4 xx 10^(22)kg The distance between the earth and the moon is 4.0 xx 10^(5)km .

Describe the way the mass of an astronaut and the gravitational force on the astronaut very during a trip from the earth to the moon.

The mass of moon 1% of mass of earth. The ratio of gravitational pull of earth on moon and that of moon on earth will be

Compares the gravitational acceleration of the eartrh due to attraction of the sun with that due to attraction of the moon. Given that mass of sun, M_(s)=1.99xx10^(30) kg, mass of moon, M_(m)=7.35xx10^(22) kg , distance of sun from earth , r_(es)=1.49xx10^(11) m and the distance moon from earth r_(em)=3.84xx10^(8) m.

PRADEEP-ELECTROSTATICS-Exercise
  1. Two identical metal spheres A and B have equal and similar charges. T...

    Text Solution

    |

  2. What is the Coulomb's force between two alpha-particles separated by a...

    Text Solution

    |

  3. What equal charges would have to be placed on earth and moon to neutra...

    Text Solution

    |

  4. The electrostatics force of repulsion between two positively charged i...

    Text Solution

    |

  5. Two small spheres each of mass 'm' kg and charge q coulomb are susp...

    Text Solution

    |

  6. Two particles, each having a mass of 5 g and charge. 1.0 xx 10^(-7) C...

    Text Solution

    |

  7. Two small spheres each of mass 10^(-6) kg are suspended from a point ...

    Text Solution

    |

  8. Two point charge q(2) = 3xx10^(-6) C and q(1) = 5xx10^(-6) C are loca...

    Text Solution

    |

  9. Two small charged spheres contain charge +q(1) and +q(2) respectively....

    Text Solution

    |

  10. Three point charges of +2muC, -3muC , and -3muC are kept at the vertic...

    Text Solution

    |

  11. A charges Q is placed at each of the two opposite corners of a square....

    Text Solution

    |

  12. Equal charges each of 20 muC are placed at x = 0, 2,4,8,16 cm on X-axi...

    Text Solution

    |

  13. Charges q(1) = 1.5 mC, q(2) = 0.2 mC and q(3) = -0.5 mC, are placed at...

    Text Solution

    |

  14. Two similarly and equally charged identical metal spheres A and B repe...

    Text Solution

    |

  15. Let us assume that charges on Earth and Sum are not neutralised and ne...

    Text Solution

    |

  16. In a certain co-ordinate system, charge, q(1) = -2xx10^(-4) C is at x ...

    Text Solution

    |

  17. Two positive charges which are 0.1m apart repel each other with a fo...

    Text Solution

    |

  18. Indenify X in the following nuclear reactions (in the first reaction, ...

    Text Solution

    |

  19. Two equally charged particles, held 3.2xx10^(-3) m apart, are releas...

    Text Solution

    |

  20. The SI unit of electric field intensity is

    Text Solution

    |