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.
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.
Ans. Following conditions are necessary for making electromagnet from a current carrying
solenoid.
(a) Circuit should be closed.
(b) A core of soft iron should be used.
