{"product_id":"gold-leaf-electroscope-with-scale","title":"Gold Leaf Electroscope with Scale","description":"\u003ch2\u003eThe classic electroscope, with a scale so it measures rather than just moves\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eAluminium case, 4mm socket, ground terminal, Teflon-insulated gold leaf support, and an internal scale on the rear glass. $70.00.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAn electroscope answers one question visibly: is this object charged, and how much. Bring a charged rod near the top plate and the gold leaf lifts; the more charge, the further it lifts. Students see a quantity, not just an effect.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe scale is what separates this from a cheap one.\u003c\/strong\u003e A transparent scale on the rear glass wall, marked from 0 to 90 in steps of 10, lets a class record deflection rather than describe it. That turns a demonstration into an experiment with results you can plot.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTeflon insulation on the leaf support.\u003c\/strong\u003e That is the part that decides whether an electroscope holds a charge for a minute or for five seconds. Teflon is one of the best insulators available for the job, and it is why this one still works on a humid day when a cheaper instrument has already leaked away.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTwo interchangeable electrodes:\u003c\/strong\u003e a disc top plate for induction work with a charged rod, and a metal hook for hanging or connecting. There is a 4mm socket and a ground terminal, so it wires into a circuit or an earth line properly.\u003c\/p\u003e\u003cp\u003eOne note: the supplier's scale is printed \"0 to 90 C x 10 C\" and does not say what the unit is. Almost certainly degrees of leaf deflection. We have asked them; do not build an assessment around the unit until we confirm it.\u003c\/p\u003e","brand":"MTA Essentials","offers":[{"title":"Default Title","offer_id":53793089323371,"sku":"EVSER1052028","price":70.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2795\/8891\/files\/ser1052028_electroscope-gold-leaf-type.webp?v=1788359039","url":"https:\/\/megaofficesupplies.com.au\/products\/gold-leaf-electroscope-with-scale","provider":"Mega Office Supplies","version":"1.0","type":"link"}