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Define self-inductance and give its unit. Write down the expression for the self-inductance of a long solenoid of length l having N-turns. |
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Answer» Solution :For definition of self-inductance, see Point Numbers 16 and 17 under the heading "Chapter At a Glance". SI unit of self-inductance is HENRY (H). The self-inductance of an air core long SOLENOID of length I, area of cross-section A and having N-turns in all its GIVEN by `L = (mu_(0) N^(2)A)/l` If a magnetic material having relative permeability `mu_(r)` is inserted in the core then self-inductance will be `L = (mu_(0)mu_(r) N^(2)A)/l.` |
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