Solenoidelectro - Note-A-Rific: Electromagnets &...

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Note-A-Rific: Electromagnets & Solenoids A long piece of wire that is twisted into a very long coil is called a solenoid . In this drawing I drew in a green tube just to make it easier to see it in 3-D… all you need are the loops of wire. The magnetic field in a solenoid can be very large, since each loop strengthens the fields created by all the other loops in a row. As a whole, the solenoid will act like a very strong magnet. We can use a new left hand rule (or right hand rule for conventional currents!) to predict the direction of the field. Second Left-Hand Rule 1. Starting at the end of the wire where the current begins, point your fingers in the direction of electron flow current. 2. Follow the wire so that you are grasping the “cylinder” with your fingers wrapping around it, still in the direction of the current. 3. Your thumb points in the direction of the north end of the solenoid. Now you could draw in the magnetic field lines (look at the diagram on page 683).
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Solenoidelectro - Note-A-Rific: Electromagnets &...

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