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At what frequency will XL be 2000 ohms for an inductance value of 250 millihenries?
impedance of an inductor = j*w*l, where j = i = imaginary number, w = frequency in radians, l = inductance
2000 = j*w*(250 x 10-3)
remove 'j' for simplicity (unless you are doing more advance bode plots!)
2000 * 10^3 = w*250
w = 8000 radians
radians = 2*pi * frequency in hertz, if the answer must be in hertz.
What else can I help you with?
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