Determine the phase shift of voltage oscillations u = Um sin(wt + φ) and current i = Im sinwt for an electrical circuit consisting of a series-connected conductor with active resistance R = 1 kOhm, an inductance coil L = 0.5 H and a capacitor with capacitance C = 1 µF. Determine the power that is released in the circuit if the voltage amplitude Um = 100 V and the frequency v = 50 Hz.
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