Home
Class 12
PHYSICS
A shower of protons from outer space dep...

A shower of protons from outer space deposits equal charges +q on the earth and the moon, and the electrostatic repulsion exactly counter balances the gravitational attraction, How large is q ?

Text Solution

Verified by Experts

Here, electrostatic repulsive force= gravitational attractive force i.e., `(1)/(4pi in_(0)).(q^(2))/(r^(2)) = (GM_(e )M_(m))/(r^(2)) or q= sqrt(4pi in_(0)GM_(e)M_(m))`
Promotional Banner

Topper's Solved these Questions

  • ELECTRIC CHARGES AND FIELDS

    AAKASH SERIES|Exercise Assess Your Self|13 Videos

  • ELECTRIC CHARGES AND FIELDS

    AAKASH SERIES|Exercise Exercise-I|80 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    AAKASH SERIES|Exercise PRACTICE EXERCISEX|44 Videos

  • ELECTRIC FIELD AND POTENTIAL

    AAKASH SERIES|Exercise PROBLEMS (LEVEL-II)|32 Videos

Similar Questions

Explore conceptually related problems

Two small spheres each having equal positive charge Q Coulomb) on each are suspended by two insulating strings of equal length L (metre) from a rigid hook (shown) in figure). The whole set up is taken into satellite where there is 'no gravity. The two balls are now held by electrostatic forces in horizontal position, the tension in each string is then

Two large conducting sphers carrying charges Q_1 and Q_2 are brought close to each other. Is the magnitude of electrostatic force between them exactly given by Q_1Q_2//4piepsi_0r^2 . Where r is the distance between their centres ?

Answer carefully: (a) Two large conducting spheres carrying charges Q_(1) and Q_(2) are brought close to each other. Is the magnitude of electrostatic force between them exactly given by Q_(1),Q_(2)//4pi epsilon_(0)r^(2) , where r is the distance between their centres? (b) If Coulomb’s law involved 1//r^(3) dependence (instead of would Gauss’s law be still true ? (c) A small test charge is released at rest at a point in an electrostatic field configuration. Will it travel along the field line passing through that point? (d) What is the work done by the field of a nucleus in a complete circular orbit of the electron? What if the orbit is elliptical? (e) We know that electric field is discontinuous across the surface of a charged conductor. Is electric potential also discontinuous there? (f) What meaning would you give to the capacitance of a single conductor? (g) Guess a possible reason why water has a much greater dielectric constant (= 80) than say, mica (= 6).

AAKASH SERIES-ELECTRIC CHARGES AND FIELDS-Practice Exercise
  1. A shower of protons from outer space deposits equal charges +q on the ...

    Text Solution

    |

  2. Wat is the charge acquired by a body when one million electrons are tr...

    Text Solution

    |

  3. Calculate force between two charges of 1C each separated by 1m in vacu...

    Text Solution

    |

  4. Two equal and opposite charges are placed at a certain distance apart ...

    Text Solution

    |

  5. Two positively charge particles each of mass 1.7 xx 10^(-27) kg and ca...

    Text Solution

    |

  6. Two charged particles are placed at a distance of 1.0cm apart. What is...

    Text Solution

    |

  7. The force between two alpha-particles separated by a distance .r. is F...

    Text Solution

    |

  8. The force between two charges 0.06m apart is 5N. If each charge is mov...

    Text Solution

    |

  9. Four point charges q(A) = 2mu C, q(B)= -5mu C q(C )= 2mu C and q(D) = ...

    Text Solution

    |

  10. The force between two charges separated by a distance 1m is 1.8N. The ...

    Text Solution

    |

  11. In 1 gram of solid, there are 5 xx 10^(21) atoms. If one electron is r...

    Text Solution

    |

  12. Two positively charged particles each of mass is 9 xx 10^(-30)kg and c...

    Text Solution

    |

  13. A charge Q is to be divided into two parts q and (Q-q) such that the f...

    Text Solution

    |

  14. The ratio of the forces between two charges placed at a certain distan...

    Text Solution

    |

  15. Two point charges +2C and +6C repel each other with a force of 12N. If...

    Text Solution

    |

  16. Two small balls having equal positive charge QC on each are suspended ...

    Text Solution

    |

  17. The force between two charges 4C and -2C which are separated by a dist...

    Text Solution

    |

  18. Two charges 9 mu C and 1mu C are placed at a distance of 30cm. The pos...

    Text Solution

    |

  19. Three point charges Q(1), Q(2) and Q(3) in that order are placed equal...

    Text Solution

    |

  20. Tritium and helium are put 2 xx 10^(-10)m apart in air. Magnitude of i...

    Text Solution

    |

  21. 10C and 20C are separated by a distance d. If the electric field at th...

    Text Solution

    |