. Electronic apparatus for biological research . â Ri/n'^ ' V-(R,/n^)/(R,/nV'-r3, IS equivalent to IS approximately equivalent to Figure gap in the magnetic circuit, which increases the absolute reluctance of the magnetic circuit and hence reduces the polarizing flux which is the cause of the trouble. The consequent improvement in permeability reduces the incre- mental reluctance of the iron and, if the air gap is not too great, actually reduces the net incremental reluctance of the whole magnetic circuit. It is on the incremental reluctance that the inductance depends (Figure ): the


. Electronic apparatus for biological research . â Ri/n'^ ' V-(R,/n^)/(R,/nV'-r3, IS equivalent to IS approximately equivalent to Figure gap in the magnetic circuit, which increases the absolute reluctance of the magnetic circuit and hence reduces the polarizing flux which is the cause of the trouble. The consequent improvement in permeability reduces the incre- mental reluctance of the iron and, if the air gap is not too great, actually reduces the net incremental reluctance of the whole magnetic circuit. It is on the incremental reluctance that the inductance depends (Figure ): the No air gap I With air I gap


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