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
Answer: Option A
Solution (By Examveda Team)
The correct answer is Option A: Nickel, copper and ironHere's why:
Perminvar is a special type of alloy known for its exceptionally constant magnetic permeability over a wide range of magnetic field strengths.
This unique property is achieved through a specific combination of elements.
Key Takeaway: Perminvar alloys are primarily composed of Nickel (Ni), Copper (Cu), and Iron (Fe).
The other options contain different elements (like zinc, antimony, and bismuth) that are not used in the standard composition of Perminvar.
This Question Belongs to Mechanical Engineering >> Engineering Materials
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Perminvar is 80% Ni and about 20% Ni
Permalloy is 45% Fe and 55% Co.
Both are softmagnetic material with high magnetic permeability.
iron (Fe), nickel (Ni), and cobalt (Co).
not a copper