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Let the magnetic field on earth be mode...

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

A

is always zero

B

can be zero at specific points

C

can be positive or negative

D

is bounded

Text Solution

Verified by Experts

The correct Answer is:
B, C, D
The angle of dip at a point on the geographical equator satisfies the options (b), (c) and (d).
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Knowledge Check

  • 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

    A
    always zero
    B
    positive, negative or zero
    C
    unbounded
    D
    always negative

  • The magnetic field of Earth can be modelled by that of a point dipole placed at the centre of the Earth. The dipole axis makes an angle of 11*3^@ with the axis of Earth. At Mumbai, declination is nearly zero. Then,

    A
    the declination varies between `11*3^@W` to `11*3^@E`
    B
    the least declination is `0^@`
    C
    the plane defined by dipole axis and Earth axis passes through Greenwich
    D
    declination averaged over Earth must be always negative

  • The magnetic field of earth can be modelled by that of a point dipole placed at the center of the earth. The dipole axis makes an angle of 11.3^(@) with the axis of the earth. At mumbai, declination is nearly zero. Then:

    A
    the plane defined by dipole axis and axis passes through greenwich
    B
    declination averaged over earth must be always negative
    C
    the declination varies between `11.3^(@)` W to `11.3^(@)` E
    D
    at least declination is `0^(@)` .

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