Externet
Well-Known Member
A circuit involving a coil -with say 5000 turns, 10cm long, 2cm ⌀ soft iron core, - feeding a differential amplifier inputs is to detect a spinning magnet at a distance.
Replacing the core with mumetal the inductance will increase ~100 times due to the permeability factor.
Increasing the inductance that way, can the spinning magnet be detected from a greater distance ?
Would a longer core of mumetal in the same coil increase the sensitivity even more ? I see no core dimension in the formula.
Replacing the core with mumetal the inductance will increase ~100 times due to the permeability factor.
Increasing the inductance that way, can the spinning magnet be detected from a greater distance ?
Would a longer core of mumetal in the same coil increase the sensitivity even more ? I see no core dimension in the formula.
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