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 141 mA 282 mA 200 mA 100 mA TRUE ANSWER : ? YOUR ANSWER : ?
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 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 : ?
In the complex plane, the number 4 + j3 is located in the fourth quadrant second quadrant first quadrant third quadrant TRUE ANSWER : ? YOUR ANSWER : ?
A positive angle of 30° is equivalent to a negative angle of –180° –30° –330° –60° TRUE ANSWER : ? YOUR ANSWER : ?
What is the angular difference between +j4 and –j4? 180° 90° 30° 270° TRUE ANSWER : ? YOUR ANSWER : ?
A capacitor with 150Ω of capacitive reactance is across an ac source. The impedance, expressed in polar form, is Z = 150 angle 180° Ω Z = 150 angle – 90° Ω Z = 150 –90° Ω Z = 150 TRUE ANSWER : ? YOUR ANSWER : ?
The complex number 40 angle 55° is equivalent to 40 + j40 22.94 + j32.76 55 + j55 45.88 + j65.52 TRUE ANSWER : ? YOUR ANSWER : ?
When the frequency of the source voltage decreases, the impedance of a parallel RC circuit does not change decreases to zero decreases increases TRUE ANSWER : ? YOUR ANSWER : ?
Point +4 on the complex plane is 4 units above the origin on the j axis 4 units below 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 TRUE ANSWER : ? YOUR ANSWER : ?