Determine the quality factor L-R-C of a serial electric circuit containing a periodic emf, if the coil inductance is L = 2.5 H, the active resistance of the circuit is R = 12.5 Ohms, and the maximum voltage value across the resistor Um = 50 V is reached at a frequency of 9.28 Hz. Consider attenuation small. Determine the resonant amplitude of the current oscillations. Write the differential equation of charge oscillations on the plates of the capacitor and its solution in the steady state.
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