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How does the magnetic field of secondary coil change when the magnetic field of first coil increases due to increase in flow of current?
If a coil is taken and current is passed through it, the magnetic field will be induced in that coil. This process is called self-induction.
Now if we place another coil(secondary coil) magnetic field will be induced in this coil as well. This process is called mutual induction.
If the current is increased in the first coil, the magnetic field increases in both the coils.
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