Thursday, August 29, 2019

SELF INDUCTION AND MUTUAL INDUCTION


SELF INDUCTION
If a current is to flow in a coil or circuit, a magnetic flux relationship occurs in that coil due to the magnetic field being generated. This value of the magnetic flux is proportional to the value of the flowing current.
If the current flowing is changed, the magnetic field produced by it and the corresponding magnetic flux changes, causing an induced electrical carrying force in the coil.
Thus the phenomenon of automatic induced electric force in this circuit due to change in current flowing in a coil is called self induction.
When current I flow in a circuit, the value of magnetic flux associated with the circuit is proportional to Φ current flowing.
I
Φ = LI
L = best inductive coefficient or auto regulation.
Unit - Henry (H)

MUTUAL INDUCTION
When  the value of a current flowing in a coil changes, the induced current carrying force in the adjacent coil is called the reciprocal induction or Mutual induction due to the change in magnetic flux corresponding to the adjacent coil.
Mutual inductance
When I1 current flows in a primary coil or circuit, the value of the total magnetic flux in the second coil is proportional to the current flowing in the primary coil.
Φ2 I1
=2 = MI1
Here M is a constant called reciprocal inductance. Its unit is - Henry (H).
If I2 = 1A
  So M = Φ2.
The numerical value of M is the relation of the secondary coil to the value of the magnetic flux that occurs when a current flows in the primary coil.
The reciprocal induction coefficient depends on the following work-
1. On the geometry of the coils
2. Through the core placed inside the coil
3. At the distance between the coils
4. On the orientation of both coils



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