[To all users]

• The behavior of the black ball inside is very mysterious for observers and makes them curious about the experiments.
• The attractive and repulsive phenomenon of static electricity can be easily shown according to the behavior of the black ball in the pendulum-type electroscope.
• An analysis of the behavior of the black ball in the pendulum-type electroscope makes a good activity for learners.
• The pendulum-type electroscope is useful to experiment with electrostatic induction in safe.

[To teachers]

• The phenomenon of attractive and repulsive can be easily demonstrated to learners with the pendulum-type electroscope.
• The experiment for learners will be safe because the combination with Static GENECON and the electric pendulum is just needed less one-tenth voltage than Van de Graaff.
• It can be easily explained the phenomenon of electrostatic induction for learners because the behavior of the ball in the pendulum-type electroscope is continuous motion compared with a conventional electroscope.

[To students]

• Learners can observe and confirm the phenomenon of attractive and repulsive of static electricity by themselves through their experiment.
• Analysis of the behavior of the black ball in the pendulum type electroscope is easier for learners than analyzing the behavior of a conventional electroscope.

• Size: φ50mm x 130 mm
• Material: Body=Acrylic acid resin, Electrode=Cupper
• Ball: Carbon Coated Plastic Ball (φ38mm)