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Alternating Current Applied to an Inductor

A current is ...

Question

A current is flowing through a solenoid from a dc source of steady emf. What will be the nature of change in the current during a quick removal of the soft iron core from the solenoid?

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Solution

$a s w e r e m o v e d t h e s o f t i r o n c o r e t h e i n d u \tan c e o f t h e s o l e n o i d w i l l f a l l . m e a n s t h e L d e c r e a s e s . \sin c e E = L \frac{d i}{d t} \sin c e t h e L d e c r e a s e s t o k e p t t h e E c o n s \tan t t h e r a t e d i / d t w i l l r i s e h e n c e t h e c u r r e n t w i l l r i s e a b r u p t l y . R e g a r d s$

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