An RC circuit is formed with connecting a 7 ohm resistor and a 25 mu F capacitor in series with AC voltage generators. The frequency of the generator is 500Hz if the effective (rms) intensity of the current in the circuit is 2.75 what is the effective value of the generator\'s voltage? Compute the phase shift and the time lag among voltage and current. Frequency of the current is doubled does the phase shift increase decrease, or stay the same?