Physics Experiment,Physical Current Magnetic Field Magnet Round Square Coil Iron Powder Physical Electromagnetism Experiment Teaching Instrument Educational Science Model

The toroidal current magnetic field is demonstrated with a toroidal coil. Put the small magnetic needles at different positions of the magnetic field, you can observe the direction and poles of the circular current magnetic field. When changing the direction of the current, the magnetic needle points in the opposite direction, and the direction of the magnetic field and the direction of the current follow the right-hand spiral rule. The solenoid magnetic field is demonstrated with a solenoid coil. The external circuit remains unchanged, and the small magnetic needles are placed in various positions to check the direction of the magnetic field and change the current Size: length 250*total width 182mm*total height 78mm Weight: Approximately 250 g in one set Purpose: To demonstrate the phenomenon of direct current passing through a wire to generate a magnetic field around it, and the relationship between the direction of the magnetic field and the direction of the current. combo: 1 current magnetic field demonstrator 4*small magnetic needle 2*wire 1*iron powder Precautions 1. This instrument is made of transparent materials, so surface friction should be avoided to maintain its transparency. 2. During the demonstration, the power supply should be cut off after the magnetic induction line is formed to avoid excessive temperature and damage to the instrument.

• *The current magnetic field consists of a linear current magnetic field, a ring current magnetic field and a solenoid magnetic field . Both use a multiturn coil instead of a single-core wire to increase the magnetic induction intensity and improve the demonstration effect.
• *Demonstrate the phenomenon that direct current creates a magnetic field over a wire, and the relationship between the direction of the magnetic field and the direction of the current.
• *The instrument is made of a transparent material and should avoid surface friction and maintain its transparency.
• *During the demonstration, after the magnetic induction line has been formed, the power supply should be cut to avoid excessive temperatures and damage to the instrument.
• *After the experiment, the iron powder is brushed with a brush.