An alternating emf source with a variable frequency fa is connected in series with a 43.02 resistor and a 19.0 μF capacitor. The emf amplitude is 11.0 V. Consider a phasor diagram for phasor VR (the potential across the resistor) and phasor Vc (the potential across the capacitor). (a) At what driving frequency fa do the two phasors have the same length? At that driving frequency, what are (b) the phase angle in degrees, (c) the angular speed at which the phasors rotate, and (d) the current amplitude? (a) Number i 216.4 (b) Number i 45 (c) Number i 1361.6 (d) Number i 158 Units Units Units Units Hz (degrees) rad/s mA

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