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General
Easy
Question
Three solenoid coils of same dimension, same number of turns and same number of layers of winding are taken. Coil 1 with inductance 
was wound using a Mn wire of resistance 11
;Coil 2 with inductance 
was wound using the similar wire but the direction of winding was reversed in each layer; Coil 3 with inductance 
was wound using a superconducting wire. The self-inductance of the Coils 
are
The correct answer is:
As inductance was wound using the similar wire but the direction of winding is reversed, so flux through is zero.
Also, 
Therefore, 
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