Physics - Sound Wave Question with Solution | TestHub
There are two solenoids of same length and inductance but their diameters differ to the extent that one can just fit into the other. They are connected in three different ways in series. 1) They are connected in series but separated by large distance 2 ) they connected in series with one inside the other and senses of the turns coinciding 3 ) both are connected in series with one inside the other with senses of the turns opposite as depicted in figures 1,2 and 3 respectively. The total inductance of the solenoids in each of the case 1,2 and 3 are respectively
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Solution:
In first case, the two inductances are in series hence total inductance In second case, the current is same, but no. of turns has doubled since the sense of turning is same. Thus hence inductance In third case, the sense of turns is opposite. So net inductance cancel each other
