Conducting putty is a useful aid to teaching resistivity and the relationship between length and cross-sectional area on resistance. A cylinder 60mm long and 20mm in diameter has a resistance of approximately 20Ω. Can readily be connected into an electrical circuit and both length and diameter can easily be altered by 're-moulding' the putty. Although harmless, plastic gloves are provided to prevent hands from becoming stained. Approx. 100g.
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