Reed Switch

A reed switch consists of an LCR circuit ( inductor,capacitor and resistor in series). Using a 12volt (50 Hz) AC voltage supply with an 8.5 ohm resistor an inductor coil of .085 Henry and variable capacitance, we can work out the angular frequency of supply as 310 rad/s and thus the reactance of the inductor will be 26 ohm and if the current was 0.42 A then we could calculate the reactance of the capacitor as 53 ohms


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