A piece of soft iron is placed within the coils of a solenoid, the current through the solenoid being sufficiently large so that the iron is completely magnetised. If the current is increased further the magnetic field within the iron will:
1. remain constant
2. increase slightly
3. increase proportionately with the current
4. decrease
Subtopic:  Magnetization & Magnetic Intensity |
Level 4: Below 35%
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