Xam idea - Science

Book: Xam idea - Science

Chapter: 13. Magnetic Effects of Electric Current

Subject: Physics - Class 10th

Q. No. 17 of Proficiency Exercise

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Under what conditions permanent electromagnet is obtained if a current carrying solenoid is used? Support your answer with the help of a labelled circuit diagram.

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

Fig. : A current carrying solenoid

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