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Questions for TERRESTRIAL MAGNETISM

Answer the following questions

1. Soft iron is comparatively ....... to magnetise whilst hard iron is ....... to demagnetise
2. The directive force of the earth's magnetic field
3. 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
4. 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 .......
5. The slow change in the earth's magnetic variation is known as the ....... change and is caused by .......
6. The magnetic moment of a magnet:
7. Which of the following materials are classed as ferromagnetic