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sma235
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Homework Statement
A series circuit contains only a resistor and an inductor. The voltage V of the generator is fixed. If R = 12 ohms and L = 4.5 mH, find the frequency at which the current is one-half its value at zero frequency. Note: The ac current and voltage are rms values and power is an average value unless indicated otherwise.
Homework Equations
f=sqrt(3R)/2*pi*L
The Attempt at a Solution
I calculated 212.21 Hz but this was incorrect