ELECTRONIC PRINCIPLES - OD1647 - LESSON 1/TASK 1
roughly illustrated by the use of iron filings as before. A
diagram of magnetic poles placed close together is shown in
figure 5.
(2) Characteristics of Magnetic tines of Force. Although
magnetic lines of force are imaginary, a simplified version of
many magnetic phenomena can be explained by assuming the
magnetic lines to have certain real properties. The lines of
force can be compared to rubber bands which stretch outward when
a force is exerted upon them and contract when the force is
removed. The characteristics of magnetic lines of force can be
described as follows:
(a) Magnetic lines of force are continuous and will always
form closed loops.
(b) Magnetic lines of force will. never cross one another.
FIGURE 5. MAGNETIC POLES IN CLOSE PROXIMITY.
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