Home
Class 12
PHYSICS
The earth's core is known to contain iro...

The earth's core is known to contain iron. Yet geologists do not regard this as a source of the earth's magnetism. Why ?

Text Solution

Verified by Experts

The earth's core does contain iron but in the molten form only. This is not ferromagnetic and hence it cannot be treated as a source of earth's magnetism.
Promotional Banner

Topper's Solved these Questions

  • MAGNETISM AND MATTER

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise Additional Exercises|19 Videos

  • MAGNETISM AND MATTER

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise Long Answer Questions|6 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise SAQs|4 Videos

  • MOVING CHARGES AND MAGNETISHM

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise ADDITIONAL EXERCISES|26 Videos

Similar Questions

Explore conceptually related problems

Temperature of earth increasing. Why?

The charged currents in the outer conducting regions of the earth's core are thought to be responsible for earth's magnetism. What might be the 'battery' (i.e., the source of energy) to sustain these currents ?

A magnetic needle free to rotate in a vertical plane parallel to the magnetic meridian has its north tip pointing down at 22^(@) with the horizontal. The horizontal component of the earth's magnetic field at the place is known to be 0.35 G. Determine the magnitude of the earth's magnetic field at the place.

what is the percentage of sources of water on earth ?

In the magnetic meridian of a certain place the vertical component of the earth's magnetic field is 0.3464 G and the dip angle is 30^(@) . The horizontal component of the earth 's magnetic field at this location is

A short bar magnet of magnetic moment 0,21 A - m^(2) is placed with its axis perpendicular to the direction of the horizontal component of the earth 's magnetic field .The distance of the point on the axis of the magnet from the centre of the magnet where the resultant magnetic field is inclined at 45^(@) with the horizontal component of the earth's field direction is (horizontal component of the earth's magnetic field 4.2xx10^(-5)

VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-MAGNETISM AND MATTER-Textual Exercises
  1. Geologists claim that besides the main magnetic N-S poles, there are s...

    Text Solution

    |

  2. The earth's magnetic field varies from point to point in space. Does i...

    Text Solution

    |

  3. The earth's core is known to contain iron. Yet geologists do not rega...

    Text Solution

    |

  4. The charged currents in the outer conducting regions of the earth's co...

    Text Solution

    |

  5. The earth may have been reversed the direction of its field several ti...

    Text Solution

    |

  6. The earth's field departs fromits dipole shape substantially at large ...

    Text Solution

    |

  7. Interestellar space has an extremely weak magnetic field of the order ...

    Text Solution

    |

  8. A short bar magnet placed with its axis at 30^(@) with a uniform exter...

    Text Solution

    |

  9. A short bar magnet of magnetic moment m= 0.32 J T^(-1) is placed in a ...

    Text Solution

    |

  10. A closely wound solenoid of 800 turns and area of cross section 2.5 xx...

    Text Solution

    |

  11. If the solenoid is free to turn about the vertical direction and a uni...

    Text Solution

    |

  12. A bar magnet of magnetic moment 1.5 JT^(-1) lies aligned with the dire...

    Text Solution

    |

  13. A bar magnet of magnetic moment 1.5 JT^(-1) lies aligned with the dire...

    Text Solution

    |

  14. A closely wound solenoid of 2000 turns and area of cross-section 1.6 x...

    Text Solution

    |

  15. A closely wound solenoid of 2000 turns and area of cross-section 1.6 x...

    Text Solution

    |

  16. A circular coil of 16 turns and radius 10 cm carrying a current of 0.7...

    Text Solution

    |

  17. A magnetic needle free to rotate in a vertical plane parallel to the m...

    Text Solution

    |

  18. At a certain location in Africa, a compass points 12^(@) west of the g...

    Text Solution

    |

  19. A short bar magnet has a magnetic moment of 0.48 JT^(-1). Give the dir...

    Text Solution

    |

  20. A short bar magnet placed in a horizontal plane has its axis aligned a...

    Text Solution

    |