Home
Class 12
PHYSICS
Obtain the earth's magnetisation, assumi...

Obtain the earth's magnetisation, assuming that the earth's field can be approximated by a giant bar magnet of magnetic moment `8.0 xx 10^(22) Am^2`. Radius of earth = 6400km.

A

`62.8 Am^(-1)`

B

`52.8Am^(-1) `

C

`72.8 8 Am^(-1) `

D

`82.8 Am^(-1) `

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

  • APPENDICES ( REVISION EXERCISE )

    AAKASH SERIES|Exercise REVISION EXERCISE (MOVING CHANGES & MEGNETISM)|95 Videos

  • ALTERNATING CURRENT

    AAKASH SERIES|Exercise EXERCISE - III|24 Videos

  • APPENDICES (REVISION EXERCISE)

    AAKASH SERIES|Exercise LAW OF MOTION|128 Videos

Similar Questions

Explore conceptually related problems

The earth's magnetic field at the equator is approximately 0*4G , Estimate the earth's dipole moment.

The earth's magnetic field at the equator is approximately 0*4G , Estimate the earth's dipole moment.

Time period of a bar magnet oscillating in earth's magnetic field is T. Its magnetic moment is M. Now, a bar magnet of magnetic moment 2M is brought near it. The new time period will be

A geostationary satellite orbits the earth at a height of nearly 36,000 km from the surface of earth. What is the potential due to earth's gravity at the site of this satellite? ( Take the potential energy at infinity to be zero). Mass of the earth 6.0 xx 10^(24) kg , radius = 6400km.

Find the ratio of the orbital speeds to two satellites one of which is rotating round the earth and the other around Mars close to their surface. (mass of the earth = 6 xx 10^(24) kg , Mass of the Mars = 6.4 xx 10^(23)kg , Radius of the earth = 6400 km and radius of Mars = 3400 km)

The magnetic moment of the assumed dipole at the earth's centre is 8.0 xx 10^22 A m^2 . Calculate the magnetic field B at the geomagnetic poles of the earth. Radius of the earth is 6400 km .

Find the ratio of escape velocities from the earth and the moon. (Mass of the earth = 6.0 xx 10^(24) kg , Radius of the earth = 6400 km, Mass of the moon = 7.4 xx 10^(22) kg Radius of the moon = 1740 km.)

What is the work done in taking an object of mass 1kg from the surface of the earth to a height equal to the radius of the earth ? ( G = 6.67 xx 10^(-11) Nm^(2)//Kg^(2) , Radius of the earth = 6400 km, Mass of the earth = 6 xx 10^(24) kg .)

Calculate the total K.E. of earth, assuming it to be a uniform spherical body moving around the sun with a speed of 30 km s^(-1) and spinning about its own axis? Mass of earth = 6 xx 10^(24) kg, Radius of earth = 6400 km ?

At what height over the earth's pole, the free fall acceleration decreases by one percent (assume the radius of earth to be 6400 km )

AAKASH SERIES-APPENDICES ( REVISION EXERCISE )-REVISION EXERCISE (MAGNETISM AND MATTER )
  1. A bar magnet takes pi/10 seconds to complete one oscillation in unifor...

    Text Solution

    |

  2. A small magnet of moment 4.8 xx 10^(-2) J/T is suspended freely in t...

    Text Solution

    |

  3. A short bar magnet used in a vibration magnetometer is heated so as to...

    Text Solution

    |

  4. A compass needle makes 10 oscillations per minute in the earths horizo...

    Text Solution

    |

  5. The magnetic needle of a vibration magnetometer makes 12 oscillations ...

    Text Solution

    |

  6. A combination of two identical bar magnets are placed one over the oth...

    Text Solution

    |

  7. A small magnetic needle performs 10 oscillations/minute in the earth's...

    Text Solution

    |

  8. The time period of oscillation of a magnet in a vibration magnetometer...

    Text Solution

    |

  9. A small magnetic needle performs 10 oscillations/minute in the earth's...

    Text Solution

    |

  10. Two short bar magnets of magnetic moments m each are arranged at the o...

    Text Solution

    |

  11. A small magnetic needle performs 10 oscillations/minute in the earth's...

    Text Solution

    |

  12. A deflection magnetometer is adjusted in the usual way . When a magnet...

    Text Solution

    |

  13. A short magnet oscillates in an oscillation magnetometer with a time p...

    Text Solution

    |

  14. Two magnets are held in a viberation magnetometer and are allowed to o...

    Text Solution

    |

  15. With a standard rectangular bar magnet, the time period of a vibration...

    Text Solution

    |

  16. A magnet makes 40 oscilations per minute at a place having magnetic fi...

    Text Solution

    |

  17. Obtain the earth's magnetisation, assuming that the earth's field can ...

    Text Solution

    |

  18. The plane of a dip circle is set in the geographic meridian and the ap...

    Text Solution

    |

  19. A dip circle lying initially in the magnetic meridian is rotated throu...

    Text Solution

    |

  20. If theta(1) and theta(2) be the apparent angles of dip observed in two...

    Text Solution

    |