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A device vary the resistance without opening the circuit - the electrical device can continue to work even as the resistance is alteredType of variable resistor with 2 contacts, usually used to control current.e.g. of controlling current = adjusting lamp brightness or adjusting motor speed

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1. A device vary the resistance without opening the circuit - the electrical device can continue to work even as the resistance is altered

Type of variable resistor with 2 contacts, usually used to control current.
e.g. of controlling current = adjusting lamp brightness or adjusting motor speed





 
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