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)4L
B)2L
C)L
D)L/2
E)L/4

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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)4L
B)2L
C)L
D)L/2
E)L/4

An Ideal Solenoid Has a Self-Inductance L