Advertisements
Advertisements
प्रश्न
The earth’s core is known to contain iron. Yet geologists do not regard this as a source of the earth’s magnetism. Why?
Advertisements
उत्तर
Earth’s core contains molten iron. This form of iron is not ferromagnetic. Hence, this is not considered a source of earth’s magnetism.
संबंधित प्रश्न
Name three elements of the earth's magnetic field which help in defining earth's magnetic field completely.
The horizontal component of the earth’s magnetic field at a place is B and angle of dip is 60°. What is the value of vertical component of earth’s magnetic field at equator?
Can the dip at a place be (a) zero (b) 90°?
To keep valuable instruments away from the earth's magnetic field, they are enclosed in iron boxes. Explain.
What is the angle of dip at a place where the horizontal component `(B_H)` and vertical component `(B_V)` of earth’s magnetic field are equal :
The horizontal component of the earth's magnetic field at a place is `1/sqrt(3)` time the vertical component. Determine the angle of dip at that place.
State Tangent Law in magnetism.
Choose the correct option.
A place where the vertical components of Earth's magnetic field is zero has the angle of dip equal to
Choose the correct option.
A place where the horizontal component of Earth's magnetic field is zero lies at
Answer the following question in detail.
How does the magnetic declination vary with latitude? Where is it minimum?
Answer the following question in detail.
Define the Angle of Dip.
Answer the following question regarding earth’s magnetism:
In which direction would a compass free to move in the vertical plane point to, if located right on the geomagnetic north or south pole?
The earth’s magnetic field varies from point to point in space. Does it also change with time? If so, on what time scale does it change appreciably?
Which of the following statements about earth's magnetism is correct?
Which of the following is responsible for the earth’s magnetic field?
At a given place on earth’s surface the horizontal component of earth’s magnetic field is 2 × 103-5 T and resultant magnetic field is 4 × 103-5 T. The angle of dip at this place is ______.
A satellite S is moving in an elliptical orbit around the earth. The mass of the satellite is very small compared to the mass of the earth. Then,
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 ______.
- is always zero.
- can be zero at specific points.
- can be positive or negative.
- is bounded.
