Home
Class 12
PHYSICS
Consider the plane S formed by the dipol...

Consider the plane S formed by the dipole axis and the axis of earth. Let P be point on the magnetic equator and in S. Let Q be the point of intersection of the geographical and magnetic equators Obtain the declination and dip angles at P and Q.

A

`0^(@),11.3^(@)`

B

`11.3^(@),0^(@)`

C

`11.3^(@),11.3^(@)`

D

`0^(@),0^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
Refer to' the adjacent Figure. The point P is at the intersection of geographical equator (GE) and magnetic equator (ME) then at this point dip = 0 and declination =`11.3^(@)`
Promotional Banner

Topper's Solved these Questions

  • MAGNETISM AND MATTER

    NCERT FINGERTIPS|Exercise Magnetisation And Magnetic Intensity|11 Videos

  • MAGNETISM AND MATTER

    NCERT FINGERTIPS|Exercise Magnetic Properties Of Materials|26 Videos

  • MAGNETISM AND MATTER

    NCERT FINGERTIPS|Exercise Magnetism And Gauss'S Law|2 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

  • MOVING CHARGES AND MAGNETISM

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

Similar Questions

Explore conceptually related problems

Let r be the distance of a point on the axis of a magnetic dipole from its centre. The magnetic fiedl at such a point is proportional to

Let the magnetic field on earth be modelled by that of a point magnetic dipole at the centre of earth. The angle of dip at a point on the geographical equator

Let the magnetic field on earth be modeled by that of a point magnetic dipole at the centre of earth. The angle of dip at a point on the geographical equator is

Let P(-7,1,-5) be a point on a plane and let O be the origin. If OP is normal to the plane, then the equation of the plane is

Let r be the distance of a point on the axis of a bar magnet from its centre. The magnetic field at such a point is proportional to

* Let P and Q be the points of trisection of the line segment joining the points A(2,-2) and B(-7,4) such that P is nearer to A .Find the coordinates of P and Q.

We can define two planes for a particular location on the surface of earth. One is called magnetic meridian and the other is called geographic meridian. Magnetic meridian for a point on the surface of earth is defined as a plane passing through this point and containing magnetic axis of earth. Similarly geographic meridian for a point on the surface of earth is defined as plane passing through this point and containing geographic axis of rotation. If we draw these two planes for a point on the surface of earth then in general these are found at some angle. Angle between these two planes is called declination for that place. Importance of magnetic meridian at a point is that net magnetic field vector of earth for that point lies on this plane. Usually net magnetic field of earth is inclined at some angle with the horizontal and this angle is called angle of dip for that place. How many points are there on surface of earth where angle of dip is 90^@ ?

We can define two planes for a particular location on the surface of earth. One is called magnetic meridian and the other is called geographic meridian. Magnetic meridian for a point on the surface of earth is defined as a plane passing through this point and containing magnetic axis of earth. Similarly geographic meridian for a point on the surface of earth is defined as plane passing through this point and containing geographic axis of rotation. If we draw these two planes for a point on the surface of earth then in general these are found at some angle. Angle between these two planes is called declination for that place. Importance of magnetic meridian at a point is that net magnetic field vector of earth for that point lies on this plane. Usually net magnetic field of earth is inclined at some angle with the horizontal and this angle is called angle of dip for that place. How many points are there on surface of earth where angle of dip is zero ?

NCERT FINGERTIPS-MAGNETISM AND MATTER -The Earth'S Magnetism
  1. The earth behaves as a magnet with magnetic Held pointing approximate...

    Text Solution

    |

  2. The strength of the earth's magnetic field is

    Text Solution

    |

  3. Which of the following is responsible for the earth's magnetic field?

    Text Solution

    |

  4. Which of the following is independent quantities is no used to specify...

    Text Solution

    |

  5. If you made a map of magnetic field lines at Melbourne in Australia, ...

    Text Solution

    |

  6. The horizontal and vertical components of earth's magnetic field at a ...

    Text Solution

    |

  7. Let the magnetic field on earth be modeled by that of a point magneti...

    Text Solution

    |

  8. Consider the plane S formed by the dipole axis and the axis of earth. ...

    Text Solution

    |

  9. The dip angle at a location in southern India is about 18^(@). Then th...

    Text Solution

    |

  10. What is the angle of dip at a place where horizontal and vertical comp...

    Text Solution

    |

  11. The vertical component of earth's magnetic field at a place is sqrt3 ...

    Text Solution

    |

  12. At a certain location in Africa, compass points 12^@ west of geographi...

    Text Solution

    |

  13. Assume the dipole model of earth's magnetic field B which is given by ...

    Text Solution

    |

  14. The angle of dip at the poles and the equator respectively are

    Text Solution

    |

  15. At a given place on earth's surface the horizontal component of earths...

    Text Solution

    |

  16. The earth's field departs from its dipole shpae substantially at large...

    Text Solution

    |

  17. In the magnetic meridian of a certain place, the horizontal component ...

    Text Solution

    |

  18. The earth's magnetic field at the equator is approximately 0*4G, Estim...

    Text Solution

    |

  19. A compass needle whose magnetic moment is 60Am^2 pointing geograhic no...

    Text Solution

    |