A 2 k resistor is in series with a 0.015 F capacitor across a 15 kHz ac source. What is the magnitude of the total impedance and the phase angle? 73.4 and θ = –19.5° 707 and θ = –19.5° 734 and θ = –38.9° 2121 and θ = –19.5° TRUE ANSWER : ? YOUR ANSWER : ?
A 6 kHz sinusoidal voltage is applied to a series RC circuit. The frequency of the voltage across the resistor is 0 Hz 6 kHz 18 kHz 12 kHz TRUE ANSWER : ? YOUR ANSWER : ?
A 12 kΩ resistor is in series with a 0.02 μF capacitor across a 1.2 kHz ac source. If the current is expressed in polar form as I = 0.3 angle 0° mA, what is the source voltage expressed in polar form? 45.6 V 0.411 V 4.11 V 411.3 V TRUE ANSWER : ? YOUR ANSWER : ?
When the frequency of the voltage applied to a series RC circuit is decreased, the impedance increases decreases doubles remains the same TRUE ANSWER : ? YOUR ANSWER : ?
In a series RC circuit, 12 V(rms) is measured across the resistor and 15 V(rms) is measured across the capacitor. The rms source voltage is 19.2 V 27 V 1.9 V 3 V TRUE ANSWER : ? YOUR ANSWER : ?
When the frequency of the source voltage decreases, the impedance of a parallel RC circuit decreases decreases to zero increases does not change TRUE ANSWER : ? YOUR ANSWER : ?
What is the angular difference between +j4 and –j4? 30° 270° 180° 90° TRUE ANSWER : ? YOUR ANSWER : ?
A 47Ω resistor and a capacitor with a capacitive reactance of 120 are in series across an ac source. What is the circuit impedance, Z? 73Ω 129Ω 167Ω 12.9Ω TRUE ANSWER : ? YOUR ANSWER : ?
In a parallel RC circuit, there is 100 mA through the resistive branch and 100 mA through the capacitive branch. The total rms current is 100 mA 282 mA 200 mA 141 mA TRUE ANSWER : ? YOUR ANSWER : ?
In a series RC circuit, when the frequency and the resistance are halved, the impedance doubles is reduced to one-fourth cannot be determined without values is halved TRUE ANSWER : ? YOUR ANSWER : ?