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Electrical Insulators and Conductors. Conductor – a material allow electrons to move freely in them (e.g., copper wire) Insulator – a material that resists or blocks the movement of electrons (e.g., wood, glass, and plastic). Water as a Conductor. Water is an insulator only if its pure.
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Electrical Insulators and Conductors • Conductor – a material allow electrons to move freely in them (e.g., copper wire) • Insulator – a material that resists or blocks the movement of electrons (e.g., wood, glass, and plastic)
Water as a Conductor • Water is an insulator only if its pure. • Most water has dissolved minerals and ions in it so it is a fair conductor. • Don’t go swimming in a lightning storm!
