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| 1. |
Under what condition permanent electromagnet is obtained if a current carrying solenoid is used |
| Answer» The conditions required to obtain permanent electromagnet when a current carrying solenoid is used are:● The rod inside solenoid should be made of a magnetic material like steel, soft iron etc. This type of material can retain the magnetic properties for a long time after magnetization.● Direct current should be used for solenoid.● The turns should be closely packed and large in number for producing a uniform strong magnetic field | |