2X Hand AC and DC Crank Generator Model, Demonstration Motor Generator Activity Model,Device Experimental Equipment,2 set * Hand crank AC/DC generator

Purpose: This machine is used for the basic structure and working principle of AC and DC generators in the teaching of junior high school physics and elementary school natural knowledge. Good for school teaching tool, learning display, and collectibles, also be a great addition to supplies. Demonstration content: Demonstrate the working principle of a single-phase AC generator; electric-phase DC generator Structure: This instrument is a permanent magnet, rotatable armature generator, composed of a stator, a rotor, brushes, a base plate and a manual mechanism. Great educational toy, it can cultivate children's interest in physics, more intuitive and easy to understand