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Unformatted text preview: heat to glow. Why we use a thin wire in a light bulb: more resistance, hotter faster. 2 The light bulb Tungsten wire - high resistance causing it to glow white-hot. Also, tungsten doesn't burn up as fast, so lasts longer. Schematic symbol: Resistance and Resistors Wires relatively low resistance. Resistors- designed to have a specific resistance; reduces the amount of current. Schematic symbol: Potentiometer Variable resistor that gives a smooth continuous change in current. Dimmer on a light Speed adjustment on fan. Volume adjustor on TV Resistance and Your Body Dry Skin: 500,000 Wet Skin: 100 Rubber soles of shoes can resist 120V; but wet feet on bathroom floor cannot. 3...
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