A Long Solenoid with 20 Turns Per Centimeter Has a Core

question 39

Multiple Choice

A long solenoid with 20 turns per centimeter has a core of iron-silicon.When the current is 1.50 A,the magnetic field inside the core is 4.50 T.The relative permeability K_m is approximately

• A)1800
• B)1310
• C)980
• D)556
• E)1190

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