Perminvar alloy having constant permeability is an alloy of A) nickel, copper, and iron B) nickel, copper, and zinc C) copper, nickel and antimony D) iron, zinc, and bismuth Related MCQs: Constantant an alloy used in thermocouples is an alloy of Heating wet steam at constant temperature is heating it at constant As compared to the constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of Delta metal is an alloy of