In an iron cored coil , if the iron core is removed how will it affect the inductance of the coil?
the inductance will increase
the inductance will decrease
the inductance remains the same
the inductance increases and then decrease after a time
If the iron core is removed, it will reduce the magnetic field around and hence, the inductance will decrease.
When current flows in the coil rounded around an iron core then the iron core becomes an: