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Mutual Inductance
Transformer works under the principle of Mutual inductance. Consider two windings, one is primary winding having N1 number of turns and the other is secondary winding having N2 number of turns. Let the changing current, i1 flow through the primary winding. The flux produced by the current i1 in N1 is Φ1 Since seconday winding is placed near the primary winding, so that a part of flux produced by primary winding will be linked by the secondary winding. Let the flux Φ2 linked by secondary winding is Φ2 = k1Φ1.
How to Increase Mutual Inductance Rate
If magnetic coupling between the two coils is very tight, then the emf induced in the secondary winding via mutual inductance will be high.
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