A conductor impaled on a piece of paper, then spread iron filings dilebaran The paper then circulate electric current, as shown in Figure 1.108. The iron powder will form a circle around the conductor.
Image 1108 The magnetic field around current-carrying conductor.
A magnetic needle placed near current-carrying conductors. Magnetic needle is moved around the conductor. Note the direction of the magnetic needle. Then the direction of the current in a conductor is reversed, note the direction of the magnet than before. It turned out that the magnetic needle direction depending on the direction of the current in the conductor. Direction of the field around each conductor can be seen Image 1109.
Image 1109 Directions current in a conductor
The arrows symbolize the direction of the current in the conductor, and equalized with arrows, then to dart away from us will be seen in the form of a cross fins (). Average dart approaching we will see a dot ().
Figure 1.110 Determining the direction of the field
Directions terrain around current carrying conductor can be determined with the help of right-hand direction, as shown in Figure 1.110. Conductor gripped so, the thumb indicates the direction of flow, the fingers of the other shows the direction of rotary magnetic field. In Figure 1 111 shown pictures field direction of the conductor cross section. Note: In this trial must have current conductor is not real.
Figure 1.111 Directions field around a conductor
When two conductors are lined up like Figure 1.112 energized in the same direction, then both conductors will be closer together.
Figure 1.112 Tensile Strength interesting
Field direction occurs between conductors cancel each other because of the opposite direction, being Outer side, a second conductor searah.Maka field direction attract each other. When the second conductive opposing energized as in Figure 1.113, then both conductors will repel each other.
Figure 1.113 repel Strength
Field direction between the conductors in the same direction, so that the strength of this field will cause both conductor repel each other.