Energized Solenoid Experimenter Right-Hand Spiral Rule Magnetic Field Demonstration Device Physics Teaching Instrument Experimental Equipment Current Magnetic Field Demonstrator Physics

1 linear current magnetic field with rectangular coil demonstration Use the vertical side of the rectangular coil. Set the current in the circuit to approx. 3 amperes, sprinkle iron powder thinly and evenly around the straight wire and gently tap the surface of the circuit board. The iron powder is arranged in several concentric rings with the wire as an axis. This is the magnetic line spectrum of the linear current magnetic field. 2 The ring current magnetic field is demonstrated with a ring coil. After energization, the iron powder arranges the magnetic induction line of the ring current magnetic field in the vicinity of the ring coil. The direction and polarity of the magnetic field of the toroidal current can be observed by placing the small magnetic needle at different positions of the magnetic field. Change the direction of the current and the magnetic needle points in the opposite direction. The direction of the magnetic field and the direction of the current follow the rules of the right screw 3 magnetic field with magnetic coil demo The external circuit remains unchanged. After the power is turned on, the iron powder is placed around the electromagnet in a magnetic induction line corresponding to the direction of the magnetic field, and the small magnetic needle is placed at each position to check the direction of the magnetic field. If you change the direction of the current, the direction of the magnetic induction line also changes

• Purpose: Demonstrate the phenomenon that direct current passes through the wire to generate a magnetic field around it, and the relationship between the direction of the magnetic field and the direction of the current.
• This instrument is made of transparent materials. Avoid surface friction and maintain its transparency.
• During the demonstration, after the magnetic induction line is formed, the power supply should be cut off to avoid excessive temperature and damage to the instrument.
• Structure: The current magnetic field demonstrator is composed of three pieces of linear current magnetic field, circular current magnetic field, and solenoid magnetic field demonstrator, all of which use multi-turn coils instead of single-stranded wires to increase the magnetic induction intensity and enhance the demonstration effect.
• After the experiment, the iron powder should be cleaned with a brush.