Ferromagnetic materials like soft iron dramatically increase the magnetic field strength when placed inside a solenoid or coil because they become strongly magnetized, effectively increasing the magnetic permeability of the core.
Which one of the following statements regarding a current-carrying solenoid is not correct?
Asked in UPSC NDA 2 2022 · Topic: Electric Current (Drift velocity and microscopic origin of current)
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Answer: D. If a soft iron bar is inserted inside the solenoid, the magnetic field remains the same.
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