When placed in series a coil and capacitor resonate at a frequency of 2251Hz and when placed in parallel they resonate at a frequency of 2228Hz. At parallel resonance it is also found that a current of 5mA flows from the supply when the supply voltage is 25V r.m.s. Determine the value of the capacitor and the inductance and the resistance of the coil. fs = 1/(2Π√LC) fp = 1/2Π √(1/LC-R^2/L^2 ) From the information given, I can work out the parallel resistance: R = vs / I = 25 / 0.005 = 5000 Ohms. But from this I don't know which way to go. Any guidance would be much appreciated.