Exam 12: Rlcircuits

-If the frequency is 400 Hz in Figure 12 -1, what is the inductance?

-If the frequency increases in Figure 12 -1, the phase angle and the current _.

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

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

-If the frequency decreases in Figure 12 -1, the phase angle and the impedance _.

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

-If the resistor decreases in Figure 12 -2, the total current _ _.

The startup current for large induction motors is very high because

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

The voltage measured across the inductor in a series RL has dropped significantly from normal. What could possibly be the problem?

-If the frequency decreases in Figure 12 -1, the phase angle and the current _.

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

-What is the voltage across the inductor in Figure 12 -1?

An RL high pass filter takes its output across:

Power in an RL circuit can be measured as:

The impedance of an RL series circuit varies inversely with the frequency.

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 .

A measured voltage of 0 V across the resistor in a parallel RL circuit would indicate:

-If the frequency is 60 Hz in Figure 12 -1, what is the inductance?