Asked by andres
How does adding an iron bar to a solenoid affect the magnetic field of the electromagnet?
It changes the magnetic field to a current.
It changes the magnetic field’s direction.
It increases the magnetic field’s strength.
It decreases the magnetic field’s strength.
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It increases the magnetic field’s strength.
Explanation: an iron core has a much higher magnetic permeability than air, so it concentrates and amplifies the solenoid’s magnetic flux (alignment of magnetic domains). That raises the field strength (and the solenoid’s inductance). Note: the core can saturate at high currents, limiting further increase, but it does not reverse the field or turn it into current.
Explanation: an iron core has a much higher magnetic permeability than air, so it concentrates and amplifies the solenoid’s magnetic flux (alignment of magnetic domains). That raises the field strength (and the solenoid’s inductance). Note: the core can saturate at high currents, limiting further increase, but it does not reverse the field or turn it into current.
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