Electrostatic Cloth Wool
Electrostatic Cloth Wool
Student's name
First and last name, and class if you know it. This goes on the pack label.
Pickup available at Mega DC – Tweed Heads South
Usually ready in 24 hours
A square of wool for charging a rod - $4.00
Pure wool cloth for generating static charge. $4.00 each.
Rub a polythene or perspex rod with wool and electrons move. It is the oldest demonstration in electrostatics and it still works better than any video, because the student does the rubbing and then watches the paper jump.
Why a proper cloth rather than a jumper sleeve. The supplier's point is that the material is chosen for charge generation rather than for how it looks - pure wool, no printing, no synthetic blend. Mixed fabrics give inconsistent results, which turns a reliable demonstration into an argument about whether it worked.
A size discrepancy we cannot resolve. The product name says 30 x 30cm and the supplier's own description says 25 x 25cm. We do not know which is right and we are not going to pick one. If the exact size matters, ask us and we will confirm before you order.
Pair it with the rabbit fur cloth: the two materials sit at opposite ends of the triboelectric series, so between them you can charge a rod either positively or negatively and show that the two charges behave differently.