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 411.3 V 4.11 V TRUE ANSWER : ? YOUR ANSWER : ?
Point +4 on the complex plane is 4 units left of the origin on the real axis 4 units below the origin on the j axis 4 units above the origin on the j axis 4 units right of the origin on the real axis 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 : ?
A positive angle of 30° is equivalent to a negative angle of –330° –30° –60° –180° 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 is halved cannot be determined without values TRUE ANSWER : ? YOUR ANSWER : ?
In the complex plane, the number 4 + j3 is located in the first quadrant fourth quadrant third quadrant second quadrant TRUE ANSWER : ? YOUR ANSWER : ?
A 470 resistor and a 0.2 F capacitor are in parallel across a 2.5 kHz ac source. The admittance, Y, in rectangular form, is 212 318.3 3.14 mS + j2.12 mS 2.12 mS + j3.14 mS TRUE ANSWER : ? YOUR ANSWER : ?
A 2 kΩ resistor and a 0.002 μF capacitor are in series across an ac source. Current in the circuit is 6.50 mA. The true power is 13 mW 845 mW 130 mW 84.5 mW TRUE ANSWER : ? YOUR ANSWER : ?
A 120Ω resistor is in parallel with a capacitor with a capacitive reactance of 40 Ω. Both components are across a 12 V ac source. What is the magnitude of the total impedance? 3.7Ω 14400Ω 4800Ω 37.9Ω TRUE ANSWER : ? YOUR ANSWER : ?
The complex number 6 + j6 is equivalent to 645° 8.4890° 3645° 8.4845° TRUE ANSWER : ? YOUR ANSWER : ?