Precision, wire-wound standard resistors are commonly made from manganin or cons

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1. Precision, wire-wound standard resistors are commonly made from manganin or constantan mainly because these alloys?

Are especially cheap and widely available

Have unusually high resistivity

Have unusually low resistivity

Have a resistivity that stays almost unchanged as temperature varies

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Manganin and constantan are prized specifically because their resistivity barely shifts with temperature, keeping precision resistors accurate and stable across varying conditions.