Question 15: AC fundamentals

Question

Three solenoid coils of same dimensions, same number of turns and same number of layers of windings are taken. Coil 1 has inductance L
1
wounded by Mn wire of resistance 6 $$\Omega$$m
$$-$$1
, coil 2 with inductance L
2
wounded by similar wire but in reverse direction in each layer. Coil 3 with inductance L
3
wounded by a superconducting wire. The relation between their self inductances will be

Accepted Answer

As coil 2 with inductance L
2
has been wounded by a similar wire as coil 1 but the direction of windings is reversed in each layer, so flux through L
2
will be zero.
As, L
2
$$\propto$$ $$\phi$$ $$\Rightarrow$$ L
2
= 0
Also, since the dimensions, number of turns and number of layers of windings are equal in coil 1 and 3.
So, L
1
= L
3

Answer

L
1
= L
2
, L
3
= 0

Answer

L
1
= L
2
= L
3

Answer

L
1
= L
3
, L
2
= 0

Answer

L
1
> L
2
> L
3

AC fundamentals

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