About This

• 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.