The complex number 40 angle 55° is equivalent to 40 + j40 45.88 + j65.52 55 + j55 22.94 + j32.76 TRUE ANSWER : ? YOUR ANSWER : ?
Point +4 on the complex plane is 4 units above the origin on the j axis 4 units left of the origin on the real axis 4 units right of the origin on the real axis 4 units below the origin on the j axis 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 12.9Ω 167Ω TRUE ANSWER : ? YOUR ANSWER : ?
An ac circuit consists of a resistor and a capacitor. To increase the phase angle above 45°, the following condition must exist: R = 5XC R < XC R = XC R > XC TRUE ANSWER : ? YOUR ANSWER : ?
In a series RC circuit, when the frequency and the resistance are halved, the impedance cannot be determined without values doubles is reduced to one-fourth is halved 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? 14400Ω 37.9Ω 3.7Ω 4800Ω 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 84.5 mW 130 mW 13 mW 845 mW TRUE ANSWER : ? YOUR ANSWER : ?
In the complex plane, the number 14 – j5 is located in the first quadrant fourth quadrant second quadrant third quadrant TRUE ANSWER : ? YOUR ANSWER : ?
The complex number 6 + j6 is equivalent to 8.4845° 3645° 8.4890° 645° TRUE ANSWER : ? YOUR ANSWER : ?
A resistor and a capacitor are in series across a 20 V ac source. Circuit impedance is 4.33 k. Current flow in the circuit is 92 mA 9.2 mA 460 mA 4.6 mA TRUE ANSWER : ? YOUR ANSWER : ?