Comparing self inductance of three solenoids

[Charles Link]

@cnh1995 When split into composite parts, $L_2$ can be composed of self inductances and mutual inductance, but in the final tally, the inductance of $L_2$ includes the mutual inductance of the component parts. $L_2=0$ with your computation.

 

[cnh1995]

but in the final tally, the inductance of L2L2 L_2 includes the mutual inductance of the component parts. L2=0L2=0 L_2=0 with your computation.

Yes, that's why in #27, I said the "effective inductance" is zero (self minus mutual). But in the problem statement, it is mentioned that L₂ is the "self" inductance of the coil, which is not zero.

 

[Charles Link]

Yes, that's why in #27, I said the "effective inductance" is zero (self minus mutual). But in the problem statement, it is mentioned that L₂ is the "self" inductance of the coil, which is not zero.

In that case, in the statement of the problem, the first time they mentioned $L_2$ they called it the "inductance of the coil", and the second time they called it the "self-inductance of the coil". This one is really splitting hairs with the use of the terms, when they themselves were rather careless in the use of the terms. I think they need to be much more clear in the statement of the problem.

 

[Jahnavi]

Thanks all for your precious inputs .

 

[kuruman]

In that case, in the statement of the problem, the first time they mentioned $L_2$ they called it the "inductance of the coil", and the second time they called it the "self-inductance of the coil". This one is really splitting hairs with the use of the terms, when they themselves were rather careless in the use of the terms. I think they need to be much more clear in the statement of the problem.

I agree. That's where I tripped at first.