The coefficients of self induction of two coils are 0.01H and 0.03 H respectively. If they oppose each other then the resultant self induction will be, if M = 0.01H  

Given data: $L_1=0.01H, L_2=0.03H$, $M=0.01H$

Concept used: Self and mutual inductance

Detailed solution:

The resultant self –inductance due to two coils is  $L_{resul\tan t}=L_1+L_2-2M$

$=0.01+0.03-2\left(0.01\right)$

$=0.04-0.02$

$=0.02H$