Created by StemPy LabA lamp marked V, W is to be run from a V, Hz supply. A coil of negligible resistance is put in series with it. What inductance must the coil have for the lamp to work at its rating?
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← Four statements about a series LCR circuit at resonance: (A) the phase angle is zero. (B) The impedance is zero. (C) The rms voltages across the coil and the capacitor are equal. (D) For a source of fixed voltage, the average power is the largest possible. How many of them are correct?A series LCR circuit takes 380 W from a source of fixed voltage when it is in resonance. The frequency is then changed to a value at which the net reactance has the same size as the resistance. How much power does the circuit take now? →
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