nd aglass tube, closed at both ends, sothat it will move freely (Fig 87).Electrify this rod and a similar oneby rubbing them with silk. Placethe rod in the wire loop and holdthe other near it. What happens ?Now electrify the rubber rod andhold it near the end of the glassrod. What happens?… … Fjg. 87. Positive and Negative Electricity. — These two experi-ments show that there are two kinds of electricity and thatboth are generated at the same time. That generated bythe glass rod rubbed with silk is called positive and thatgenerated by the rubber rod rubbed with flannel is…
Physics
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