RL Circuits - General Questions (2)

A 140  resistor is in parallel with an inductor having 60  inductive reactance. Both components are across a 12 V ac source. The magnitude of the total impedance is

A 12 k resistor is in series with a 90 mH coil across an 8 kHz ac source. Current flow in the circuit, expressed in polar form, is I = 0.30° mA. The source voltage, expressed in polar form, is

Referring to Problem 23, the reactive power is

A 470  resistor and a 200 mH coil are in parallel. Both components are across a 1.5 kHz ac source. The total admittance of the circuit, in polar form, is

When the frequency is decreased, the impedance of a parallel RL circuit

A 1.2 k resistor is in series with a 15 mH coil across a 10 kHz ac source. The magnitude of the total impedance is

A 470  resistor and a coil with 125  inductive reactance are in parallel. Both components are across a 15 V ac voltage source. Current through the inductor is

To increase the current in a series RL circuit, the frequency