A wire of fixed lengths is wound on a solenoid of length \[\ell \] and – McqOptions

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1.	A wire of fixed lengths is wound on a solenoid of length \[\ell \] and radius r. Its self-inductance is found to be L. Now if same wire is wound on a solenoid of length \[\ell /2\] and radius r/2, then the self in- ductance will be -
A.	2L
B.	L
C.	4L
D.	8L
Answer» B. L

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