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Which of the following is responsible fo...

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

A

Convective currents in earth's core.

B

Diversive current in earth's core.

C

Rotational motion of earth.

D

Translational motion of earth.

Text Solution

Verified by Experts

The correct Answer is:
A
The earth's core is hot and molten. Hence, convective current in earth's core is responsible for it's magnetic field.
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NCERT FINGERTIPS-MAGNETISM AND MATTER -The Earth'S Magnetism
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  2. The strength of the earth's magnetic field is

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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