Exam 12: Capacitors

If the resistance decreases in an RL filter circuit, the cutoff frequency increases.

If the frequency increases in an RL circuit, the impedance decreases.

An ohmmeter can be used to accurately test the impedance of an RL circuit.

In a RL circuit, the inductive reactance is:

The output at the cutoff frequency of a low pass RL filter is 0 V.

-Calculate the true power in Figure 12-1.

-If the resistance increased to in Figure 12-2, the total impedance is ________.

-If the operating frequency decreases in Figure 12-1, the inductance ________.

-What is the phase angle in Figure 12-3, at the cutoff frequency?

The impedance of a series RL circuit is found by directly adding the values of

If a load is purely inductive and the reactive power is 10 VAR, the apparent power is ________.

A low-pass filter passes high frequencies and blocks other frequencies.

The overall phase angle of a parallel circuit with a resistance of and an inductive reactance of 25 kΩ would be nearly 90 degrees.

Power dissipated by the resistor in a parallel RL circuit can be increased with the addition of a capacitor in parallel.

-If the frequency increases in Figure 12-1, the current ________.

Which of the following is typically most important of the three types of power in terms of work being done?

-What is the apparent power in Figure 12-1?

-If the resistance increases in Figure 12-2, the total current ________.

The source voltage always leads the total current in an RL circuit.

-If the frequency increases in Figure 12-1, the phase angle ________ and the impedance ________.