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Questions for TERRESTRIAL MAGNETISM

Answer the following questions

1. The directive force of the earth's magnetic field
2. Which of the following materials are classed as ferromagnetic
3. The magnetic moment of a magnet:
4. The slow change in the earth's magnetic variation is known as the ....... change and is caused by .......
5. Soft iron is comparatively ....... to magnetise whilst hard iron is ....... to demagnetise
6. If the total force of the earth's field at a point is T and the horizontal and vertical components H and Z, the value of H is found by the formula
7. The red pole of a freely suspended magnet will point towards ....... and at latitude 60°N will point ....... at an angle known as the angle of .......