i wanna build a 50 uH inductor for 220 volt and 1 A. which core would be good for this purpose? I will really appreciate your help.
1 amp and you need at least #20 wire. Inductance of a solenoid, air L ??N?A/Ln Ln is length in meters A is cross-sectional area in meters? N is number of turns ?? is the magnetic constant 1.2566×10?6 H/m (or T·m/A) assuming a coil 1 cm in diameter and 2 cm long A 0.0000785 m? L 0.02 m 50? (1.26e-6)(0.0000785)N? / (.02) N 100 turns a bit large for practicality. But if you extend the length to 5 cm, that brings the number of turns to 40, that can be done.
doubt if you need a core just a good number of turns and area will get you that value
