Double Ball Electroscope Fish Model Included: Cathode Ray Tube Magnetic

Included: Cathode Ray Tube Magnetic Field Effect Deflection Crookes Tube with Rectangular Plate

Operates with both mains power and rechargeable battery

5times of rated current

You get a set of 10 learning numbers from 0 to 9

Store away from sunlight

Double Ball Electroscope Fish Model Included: Cathode Ray Tube MagneticDouble Ball Electroscopes. Electroscope for demonstrating static electricity. Two pith balls suspended on unspun silk string to test for charged objects. Plated brass pillar for durability. Plastic base for display. Suitable for high school or college students, or ages 14 to 21 Premium Quality: Double Ball Electroscopes is made of high grade construction all the way through, excellent build quality and proven reliability across the range. Designed for