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@Gyro Gearloose
Note for OP
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L net ln also has denominator x forgot to write
why are you finding the magnetic field?
if you just look at the formula of self inductance
length is changing in the q, others are constant, so since length is increasing by a factor of 3
self inductance is directly proportional to length, so it should be 3
what
L = phi / I
for Phi i need B
a copper wire is wound around it, it will act as a solenoid
you can directly use the formula of solenoid
over here its directly proportional to l
oh
you can do it by your method too but at the end of the day, it will again be proportional to l only and you've to use this trick
so its same for all shapes
yes if a wire is wound around it
+solved @trin
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