a wire of fixed length is wound on a solenoid of length l and radius r its self - Physics - Electromagnetic Induction

Question

a wire of fixed length is wound on a solenoid of length l and
radius r its self inductance is found to be L now if same wire is
wound on a solenoid of length l/2 and radius r/2, then self
inductance will be
(Answer 2L)

Sanjay Singh · Accepted Answer

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a wire of fixed length is wound on a solenoid of length l and radius r . its self inductance is found to be L. now if same wire is wound on a solenoid of length l/2 and radius r/2, then self inductance will be (Answer 2L)

a wire of fixed length is wound on a solenoid of length l and radius r . its self inductance is found to be L. now if same wire is wound on a solenoid of length l/2 and radius r/2, then self inductance will be
(Answer 2L)