You are watching: Inside the toroid, in which direction does the magnetic field point?
Two that the many common and useful electromagnetic devices are dubbed solenoids and toroids. In one type or another, castle are component of numerous instruments, both large and small. In this section, we study the magnetic field common of this devices.
A lengthy wire wound in the type of a helical coil is known as a solenoid. Solenoids are typically used in experimental research requiring magnetic fields. A solenoid is typically easy to wind, and near the center, that is magnetic field is fairly uniform and directly proportional come the current in the wire.
(Figure) shows a solenoid consists of N turns of cable tightly wound over a size L. A present I is flowing follow me the wire of the solenoid. The variety of turns every unit length is N/L; therefore, the number of turns in an infinitesimal size dy are (N/L)dy turns. This produces a current
which is the magnetic field along the main axis that a limited solenoid.
Of distinct interest is the infinitely long solenoid, because that which
By just how much is the approximation
A solenoid v 25 transforms per centimeter tote a current I. One electron move within the solenoid in a one that has a radius of 2.0 cm and is perpendicular to the axis that the solenoid. If the speed of the electron is
A toroid has actually 250 turns of wire and carries a existing of 20 A. That inner and also outer radii are 8.0 and 9.0 cm. What space the values of that magnetic ar at
A toroid through a square cross section 3.0 centimeter
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