RL Circuits - General Questions

If the frequency is halved and the resistance is doubled, the impedance of a series RL circuit

If a load is purely inductive and the reactive power is 12 VAR, the apparent power is

When the frequency of the voltage applied to a series RL circuit is increased, the phase angle

A 3.3 k resistor and a 120 mH coil are in parallel. Both components are across a 2 kHz, 12 V ac source. The total current in the circuit is

Which of the following power factors results in less energy loss in an RL circuit?

When the resistor voltage in a series RL circuit becomes less than the inductor voltage, the phase angle

A 47  resistor is in series with an inductive reactance of 120  across an ac source. The impedance, expressed in polar form, is

In a parallel RL circuit, there are 3 A rms in the resistive branch and 3 A rms in the inductive branch. The total rms current is