An ideal solenoid has a self-inductance $L$. If you now double its radius and its length, but do not change the number of coils, what will its self-inductance be?
A) $L$
B) $L / 4$
C) $4 L$
D) $L / 2$
E) $2 L$

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The Answer of An ideal solenoid has a self-inductance $L$. If you now double its radius and its length, but do not change the number of coils, what will its self-inductance be?
A) $L$
B) $L / 4$
C) $4 L$
D) $L / 2$
E) $2 L$

An Ideal Solenoid Has a Self-Inductance LLL If You Now Double Its Radius and Its Length

An Ideal Solenoid Has a Self-Inductance $L$ If You Now Double Its Radius and Its Length