A copper wire is wrapped 65 times around an unknown core of length 28cm. The current in the wire is 800mA and the magnetic field due to the electromagnet is 1.63 x 10-2T. What is the most likely material the wire is wrapped around?
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Answer:
Relative permeability μr is 689 which is closer to the value for Manganes-Zinc Ferrite. So the core is likely made of Manganese-Zinc Ferrite.
Explanation:
Solenoid: The magnetic field strength
B , inside a solenoid of length l made of N number of turns, carrying a current and having a core made of a materialwith magnetic permeability μ=μ0μ is:
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